> There is no “one size fits all” database engine, that was proved by both WebSQL and IndexedDB.

It was not proven at all. WebSQL was deprecated based on "we don't want to standarize on single project". IndexedDB happened because they wanted to standarize on single API (lmao), but it was just too inept.

There is no one size fits all but WebSQL fit A LOT of use cases.

Low level storage that works for DBs is interesting idea but that also means you need to ship additional megabytes of code with every app.