If I remember correctly, the main argument against web sql was that it really was just SQLite disguised as a web standard. I.e. there was a single implementation which defined the spec: SQLite. Every browser implementation relied on it.
In retrospect, with the chrome monoculture we have today, this seems like a silly argument but at the time it was a legitimate concern.
In retrospect, with the chrome monoculture we have today, this seems like a silly argument but at the time it was a legitimate concern.