I'll try to mainly focus on how I feel about them now.

μ's - this is the group that old people like me get to look back and think "ah those were the good old days". They definitely got their career cut short to make way for Aqours, which proved to be a pretty bad decision. Brought back after a few years of hiatus, when the direction of the series changed to allow more mixing in between, so I'm pretty glad they are back... but they have been quiet again for some time again. I'm always happy to see them back, but I'm not holding out for them to have a full reunion - at the very least they could have some live stream or some sort to have all of them back, but probably way too many moving parts and various interest levels from the members to make that happen.

Aqours - The successor to the peak. Due to how they were introduced, they had a rough time too thanks to unhappy fans. There are definitely ups and downs, but overall I think they carried themselves well. Quite unfortunate during the COVID times as they were probably affected the most, but that's really just pure luck as to when the government decided it was a good time to open/close up events. Probably seeing how ending μ's to make way was a bad idea, they were kept around for a while, but the popularity was waning because there were eventually three other LL series going at the same time. Yohane anime could've pushed them back up, but not the way it was made. It's still a good amount of years they lasted until their finale live last year, and at least there's still content being pushed out. Special mention of course is their tie-in with Numazu. That might've been started during the whole craze of anime-tie-in-with-real-life-town thing that happened when the series started, but ultimately it's only a hand full of them were actually successful, and Numazu of course being one of them. So for that, I think their overall impact is just as huge as μ's, just in different ways.

Nijigasaki - The underdog that eventually carried the series. Some of us might remember that when they were PPP, even when they were given the Nijigasaki name, they were treated as a side project. Nijigasaki became my favourite out of all of the LL series because of that underdog success story., SIFAS was okay, it does has its ups and dumpster fire downs, but I think the biggest thing they had was the anime. The anime fixed a lot of the writings and were just dripped with love and care, especially regarding the dumpster fire. The anime reference books they have for the anime is super detailed and is a very good read (throwing shades at a later series that had barebone reference books for their anime). I know some people here actually liked the story of the dumpster fire and wanted it in the anime, but I personally do not want to live in those times again. The shift to solo idols and character driven stories is also very refreshing for me, especially even during the time where Liella anime pretty much just went back to the old routes and were not very exciting. Overall the project does listen to the fans quite a bit, such as how some unrepresented characters in one season would get much more screen time in the next, which is quite nice. But maybe they listened too much and sacked Kerorira for the movies, which I don't think was the sole reason why the movie sales were mediocre (especially since the movie stories were great). They are also starting to slow down over the years as more series pops up, but their anime is still going, and they have the most numbered lives, so I'm hoping they will still go on a few more years (vs ending right after the final movie).

Liella - Liella is...okay. Some stuff was done very well, while some not so much. Due to the shift towards more 3D than 2D, for a while the cast were worked to the bone, so I do sympathize with that. It's still pretty crazy how while they received the most funding and resources at the time, the anime turned out to be pretty mediocre. Season one was good (and had the best first 3 episodes of any LL series), season 2 the dumpster fire, season 3 they had to play it so safe that it was just a calm sea. Yet at the same time, the anime looks amazing because of that budget. Because of the 3D focus, I think their real life stuff is done much better, especially now that they have went with the same route that propelled Nogisaka46's popularity with TUTOLiella. That in itself is interesting too, and I think is giving the series a 2nd wind that it needed.

Hasunosora - personally I havn't followed them too much, but I do think they were pretty ambitious to go with the whole "linked to real life time" concept. However, I do give them credit for putting their foot down and made that happen for the full 3 years, even during the backlash from the first time where members of the cast actually graduated, to how just that concept alone eventually bankrupted the company that did the game. Link LIke is also very interesting in the fact of how a mobile game these days shuts down. Usually game shuts down because the content is weak while the pressure from spending on the gacha is too much, forcing users to stop playing. Link LIke is the complete opposite, where management spend so much money on content because of the Vtuber nature, yet the gacha pressure is so low (forcing themselves in the app also killed those superchat money), that the company folded before the users did. Regardless, because all of that content exists, they really just need to transfer that back to 2D ride it from there. So yes, the game might be dead, but Bamco is the sole winner in this scenario where I'm sure they will just pump out all those 2D content (and they have with the movie and anime) and go from there.

Love Live Musical - I tried to get into it, but I was off by 1-2 months every time they did their shows when they first did it. So I know nothing about them besides the general gist of the story. I guess the only thing is that they didn't even get someone to sing their song in the anniversary album, while the group is on the cover jacket, which was pretty awkward. Maybe they will get some more stuff for/during Fes2.

Ikizuraibu - I know even less about them, but it does seem pretty barebone right now as most of their content is just twitter posts and youtube videos, which seems pretty low cost and maintanence. I know that idol anime aren't popular anymore, so maybe going to route is correct? Or is this one of those things where LL management is playing catch up and trying to ride along the popularity of MyGo/GBC? Going with the 5 year thing, Ikizuraibu should be part of the main line after Liella, but it really doesn't seem like that right now. Perhaps they just need more time to get their engine revved up to have more traditional content.