This is from 2021, why post this now…?

That’s not what I asked. I asked about a comparison of both of them to PostgreSQL.

Are there real advantages to using either MySQL or MariaDB instead of PostgreSQL?

Has it ever not been?

I use it all the time in web browsers (Firefox/LibreWolf can do it even on Linux). I learned to use computers on Windows (mainly XP), so as far as I’m concerned, that has “always” been a thing, so why would I not use it.

Former Windows users who expect that to start scrolling. I remember that happening to me when I was new to Linux.

It’s a thing some people occasionally do. By itself it’s neither a good idea nor bad idea, but people have certainly been confused by it before. It’s better to use software for its actually intended purpose, that is less confusing both for oneself and everyone else.

I have long found it more useful what the middle mouse button does on Windows (start scrolling) and hope that becomes widely adopted, even outside browsers, on Linux one day too. Good step in that direction.