In practical terms, is this kind of architecture available to consumers except through Apple?
replyAMD Strix Halo. Available in the Framework desktop, various mini PCs, and the Asus Rog Flow Z13 "gaming tablet." The Z13 is still at $2700 for 128 GB which is an incredible deal with today's RAM prices.
replyThere's also the Nvidia DGX Spark.