Modern CPU are already able to process chunks larger than 64bits, (eg. AVX-512) I can see that growing larger over time, in practice it already has with ARM SV

Modern CPU are already able to process chunks larger than 64bits, (eg. AVX-512) I can see that growing larger over time, in practice it already has with ARM SVE. Because of that, memory bus width can also grow in a useful way. But for adressable memory, I don't see it. 64 bits is likely to be the end-game until we use a radically different CPU architecture. (much bigger than the difference between a Z80 and a Xeon) Of course, predicting the future is notoriously hard, but if you want to make an educated guess, it is better to not expect infinite and monotonous growth. There is always an end-game.