How much? You typically don't want more than a few different fonts on a given document. And neither fonts nor web images should be bigger than hundreds of kilobytes. How do we get to gigs?

Well, and then you have Claude Code which at one point needed 68GB of RAM to run https://x.com/jarredsumner/status/2026497606575398987

:)

Aka poor resources management.

If you have significantly more images loaded in RAM than what fits on your screen, something wrong is going on. (Not counting the filesystem cache here, because it works in a best effort way).