The problem with this assertion is that this data still has to hit persistent storage somehow. Should that be in an arbitrary binary format? How should it be indexed for constant-time access? Essentially the problems that a specialized user database would need to solve would mean re-implementing exactly what generalized databases are built to do.

It's not a problem of how it's being stored. It's a problem of what is being stored.

I would suggest that the world doesn't need a specialized database for this, it needs killer libraries that make all necessary operations dead simple with any backend. And they should be dead simple to find and install.

More fundamentally, though, I'm not sure this problem is entirely solvable. Even with all the libraries and informational websites in the world, if developers don't go out and look for that information (and find the right stuff), they may never know they're doing anything wrong.

P.S. Hello again, alter ego.