Raiden Fighters Remix on PS5 - spent about 30 minutes with it last night after completing RE9.
Seems to play fine to me, compared to my previous experience with the awesome Xbox 360 port. The ships are a little more responsive than I remember, but I really don't understand the meltdowns some are having on the shmups forum over this... although, I think most of that vitriol is aimed at the Switch port, which I'd never even consider getting in the first place.
I'll spend more time with it at the weekend, and if I find anything massively amiss I'll post back here.
Oh, btw, they have done a great job with the sound, it's frickin' awesome through my home theatre set-up... the wife is going to complain for sure when she's back.