No need. 32 bit became a hindrance because a 32 bit address bus can only address up to 4GB of RAM.

A 64 bit address bus can address up to 16 EB of RAM. Exabytes. To get there we would need to pass Gigabytes, Terabytes, and Petabytes of RAM capacity before we get to Exabytes.

That is a limit that we simply will never hit, at least not with silicon based computers.

Nvidia for Geforce 5000: You get 8GB, and you will deal with it. $2500 not please.