Do you have a link pointing out the filesystem API actually being developed further? AFAIK that whole API is kind of stable and done but I might be wrong.

The other API worth knowing about is the more direct File System Access API, which is the one that allows direct access now: https://developer.mozilla.org/en-US/docs/Web/API/File_System...

wrt SQLite, icmyi: https://github.com/jlongster/absurd-sql