why should I move from mysql to mariaDB?
Discussion
I like MySQL and have used it for many projects. However, I believe it's been announced EOL, so a new project should probably use an DB that's still being actively developed. mariaDB is a good option. You could also opt to use an active fork of MySQL, but personally I don't like using forks of core functionality software unless it's been sufficiently developed for at least a year by competent devs, and has its own well-known identity. The database is just too important to risk.
I should probably point out that maríaDB is a MySQL fork, but it meets the exemption criteria I outlined in my previous comment; It's been developed by competent devs for an extended time, and it has its own established identity. It's also now the default database in several Linux distributions, such as Debian, Fedora, OpenSUSE, and Red Hat Enterprise. Here's a comprehensive comparison of MySQL and maríaDB that you may find helpful:
You shouldn't. Idk ... 😂
Because you can