Apple did a lot right with this change to make memory fast. I can see AMD and Intel adopting a similar strategy and putting something like 16 GB of dram on chip. Need more than that? Then add “L2 dram” on an external dimm. 16 GB will cover most people’s use cases and with the ability to add L2 dram the high memory usage cases are covered too. (I remember when you could buy cards with L2 cache on them back in the day. 486 I think had them. This is just taking it to the next level.)