PS5 is mine since 2 days now !
I have played 2h this morning on Assetto Corsa, and everything is fine ! My T-GT and T-LCM are fully functionnal.
It's the only PS4 game I have where a warning message is showed at launch "this PS4 game can have an unexpected behaviour", but nothing special happens during playing, no crash, bug, and online is accessible.
PS4 save is working, just copy it on your PS5 before installing the game.
Loading times are slighty better.
Forced HDR is on, it makes a little change on colours, like more "real", OK for me.
And the best for the end, frame rates drop have totally disapear. On my PS4 Pro I was unable to play Ultimate Event #76, Audi TT Cup on Red Bull Ring, 24 cars. On my PS5, it's totally smooth !!
So, at this time, it's perfect !!!
Not the rigth thread for that, but ACC is totally playable now, frame rate is perfect !!