Comment by LorenPechtel

I'd love to see this.

Bring back the "segmented" memory architecture. It was not evil because of segments, but because of segment size. If any segment can be any size the bad aspects fall away.

File handles aren't needed anymore. You open a file, you get back a selector rather than an ID. You reference memory from that selector, the system silently swaps pages in as needed.

You could probably do the same thing with directories but I haven't thought about it.