You’re echoing my point back at me, though to be fair I should have been more explicit that my examples from the 1960s were about caches and virtual memory and

You’re echoing my point back at me, though to be fair I should have been more explicit that my examples from the 1960s were about caches and virtual memory and other causes of nonuniform access hidden under a random access veneer. But we can go 15 years earlier: Von Neumann wrote in 1946: “We are therefore forced to recognize the possibility of constructing a hierarchy of memories, each of which has greater capacity than the preceding but which is less quickly accessible.” https://www.ias.edu/sites/default/files/library/Prelim_Disc_Logical_Design.pdf https://www.ias.edu/sites/default/files/library/Prelim_Disc_...