Do a 500GB Samsung 870 EVO in the case for your OS, Joystick programs, VR/Tracker's, etc.... and a 2TB Samsung 970 PRO NVMe M.2 on the Mobo for your games. Keep them separate, if the OS craps your games are safe, along with backups... I have two 1TB NVMe M.2's on the Mobo, with the 500GB in the case. It's always been a rule of thumb for me never to put all my eggs in one basket............. or park all your planes on the ramp wing tip to wing tip....... When I build a new computer my storage drives all migrate to the new machine, saves money and time in the long run.
Cheers