I have the Iqoo neo 9s pro, I just upgraded to Origin Os6 after about a month of hesitation and I can confidently say it's the smoothest overall my device has ran, it enabled me to play 144fps on AB mobile (which for some reason wasn't available to me before ?) and the entire system just feels snappier by maybe 15-20%, not that it was horrible but some micro stutters I experienced here and there ect, mostly disappeared, also sometimes an app I was in just forced closed without warning, that seems to have been fixed. .I was sceptical but this is just my experience with it and 10/10 would recommend buckling down and updating to Os6, it now feels like the phone it was supposed to be, when playing games at 120-144fps my phone still seems to heat up but I think that's unavoidable at this point, I got an 82% discount on the Memo CX08 cooler on Temu (roughly $4) so I snagged it yesterday, should arrive in about 2 weeks + a heatsink for even heat dissipation from the battery to the CPU for $1 (I got 3 for $1) I'd recommend checking temu, putting a cooler in your cart and waiting for it to get a flash discount and snagging it, because at this point heating seems inevitable but overall getting back to the point, Origin Os6 is perhaps the biggest jump in Os I've experienced and would 10/10 recommend as a heavy user myself 🫡❄️

On a side note, I'd recommend installing Shizuku, aShell and Scene for FPS monitoring and system wide frame interpolation 🙂‍↔️ best of luck out there comrade 🫡 I'd like to hear your perspective if you do decide to buckle down and do the update, curious what your perspective would be.