Only you can anmswer this question
Do you enjoy/plan to play gt7? Then no, you will need a ps5 compatible setup.
Acc (PC version) is not dead yet and still the official game for gt world challenge/sro.
EVO is work in progress and compared to acc more single player (and road cars!) oriented.
LMU is the new kid on the block with the official license for wec/le mans (and soon elms!), some youtuber say it's on par or even better than iracing for competitive racing/multiplayer.
Personally I get sometimes bored/frustrated with a single game/sim and then play something different (eg gt7 on ps5 > [raceroom|ac|acc|ace|iracing|ams2|rf2|other "real" sim] on pc or vice versa)
If you can afford it, get them all