It may not have the popularity it once did, but MySQL still powers a huge % of the internet.

Is there a problem with that?

Not the original commenter, but I thought sqlite had that title.

sqlite is arguably not really a DBMS, just a DB

It's technically a DBMS, but I can see why you wouldn't compare it to MySQL.

The database is the file, the management system is the api to use the file.

arguably is doing a lot of work