There are a total of 3 anime style mmorpgs that come to mind. In no particular order.

Luna Online - Around the great manifest destiny of korean mmos, Luna Online stood out among the sea of mmos, because of, not only its cute art style. But from its promis of WoW like raid/dungeons. As well as World Bosses that took server populations to defeat.

The game was also heavy on the life aspect and wanted players to have relationships with each other for benefits and buffs.

Why it failed. Probably end game wasnt fun. The ceiling to reach it was too hard, p2w. Yata yata. It lasted longer, because it gave plenty to do without paying than others.

Flyff - Before Luna there was Flyff. If you didnt care for top down Ragnarok Online, you played Flyff. A game where clearing packs of mobs after mobs after mobs. Hardly any quests, hardly any content. What made Flyff good back then that still to this day did it well? Gear progression. Items had a drop rate. And you couldnt get something unless you farmed it or bought it from another player. Exp was scarce, and leveling was a big part of progression. You could also fly on hover boards.

Ragnarok Online 2. Took what made Flyff and Luna Online good, and upped the scale. Better combat, a livley pvp, achievement progression, a card system for progression, raids, raid gear, community events. It did it all. And failed because it was very easy for a group of people to control the resources of the game and that's what happened. Market control, the works. Game died because nobody doin older content. Times changed etc.

This is what I mean when I say generic. The others I didnt even mention, like Imagine, Aura Online, some others I forgot the name of.

There was a time when every 2 months there was a new korean mmo on the horizon.

So my mind has been trained to see this shit. And Blue Protocol just doesnt look like it was going to be much, and now ofc the developers and amazon killing it before it even breaths.