Most consumer platforms only allow up to 128/256GB of RAM. If you want more you likely need a data centre platform. This is again a mismatch between what companies think consumers are at and the reality.

I think e.g. AMD missed the boat with 9950x3d2 by limiting memory controller. If it was possible to hook it with 1TB of consumer DDR5 RAM, that would be something to write home about.

Some people, including myself, loathe Nvidia with the fiery burning passion of a thousand suns, and will put up with whatever nonsense is necessary to run without them.