Google linux swap and ramdisk, also cache systems of modern filesystems like bcache, what you think of was already created one way or another, but you probably trying to say that we shouldn’t need to upload data to ram at all, well, data usually compressed or/and encoded so it needs space to uncompress/decode and here’s where ram/swap comes into action, also you can compress ram/swap to get more space look up zram zswap, also there’s linux kernel patches for ram deduplication, also if you manipulate swappiness you can regulate which data uploads to swap (higher numbers upload to swap unsaved data and data which was on disk already gets uploaded from disk thus saving ram space) all ram optimisations you can think of is already implemented