Server version: 5.5.56 MariaDB is old version?

I've seen cPanel never feature for MariaDB 5.5.56, Only cPanel supported 10.X and MySQL 5.6, 5.7.

Plesk doesn't have an upgrade and downgrade from MySQL, MariaDB version.

MariaDB 5.5.56 is old isn't? 10.X is the newer version, I needed for that.