Yes, the goal was to make pragmatic choices in order to make the data freely available, here and now, to other apps (most of which operate on plain text files), despite running in the browser. I do have hope that the POSIX file system still has its place in a "change-aware" setup, for instance by adding a folder, similar to .git, alongside the "final state materialization". Do you see a reason for this not to work?

I'm really thinking in practical terms, i.e. of how we can make this happen incrementally, without forcing a new standard that everyone needs to adhere to in order for it to work.