I started to use MySQL at some point when I had some issues that I couldn't get around. I normally use the tool in professional opportunities and when I require support from MySQL.
Cacti is a tool for monitoring devices on a network in graphical terms, for which it uses MySQL or MariaDB. I mostly deploy Cacti with MySQL or MariaDB. Somewhere down the line, I started to have some issues with the permissions in MySQL, including its areas like superuser privileges and similar stuff, which took me a while to figure out. I think the tool is fine for me now.