I believe the absurd things are: - the idea (i.e. storing a database in a database) - the fact that the resulting storage is faster than vanilla indexed db.

The repo's readme is a bit misleading and it does make it look like a mad scientist experiment but you can read more about it here (really interesting stuff): https://jlongster.com/future-sql-web

Obviously this project is still young, but I find it convincing (disclaimer: I don't use it yet).