This is a fantastic idea, truly innovating what you can do with Postgres. Kudos!

Postgres, possibly surprising to many, is very "simple": it has essentially no dependencies other than a few OS system calls (open, read, write files) and some optional dependencies (e.g. libssl). Therefore, it is very portable and "easy" to compile on many environments. This includes new environments or ideas like compiling it to WASM.

But you need to come up with the idea. This is a great one and opens the door to other use cases. I hope this serves to push the mindset that Postgres can also be used in lighter-weight environments where SQLite (another fantastic database, don't get me wrong) is often considered as the only viable choice.

edit: typo