It’s a big thread (by virtue of being a cool piece), so maybe someone said this already, but isn’t there kind of a middle ground where we let existing software continue to run but acknowledge a changing hardware landscape by really cranking up (default) page sizes?

Userland allocators already work pretty hard to hit in the TLB [1], but huge-page tuning and whatnot is, to your point, only hitting the sweet spot on modern gear via effort/luck.

[1] https://engineering.fb.com/2011/01/03/core-data/scalable-mem...