alt Hacker Newswhile that's true, CPUs already have automatically managed caches. it's not too much of a stretch to imagine a world in which RAM is automatically managed as well and you don't have a distinction between RAM and persistent storage. in a spinning rust world, that never would have been possible, but with modern nvme, it's plausible.
Cpus manage it, but ensuring your data structures are friendly to how they manage caches is one of the keys to fast programs - which some of us care about.