[yomismoaqui]

Just by its testing and its number of installations (real world testing) you could consider SQLite being more "industrial strength" than any other DB on the market.

- https://sqlite.org/testing.html

- https://sqlite.org/mostdeployed.html

EDIT: added links

[eduction]

Exactly. There is no reason to complain about it. It is successful. People who find it lacking can use something else, there are many options.