TL;DR is that I say yes to your "but i must say mariadb V10.2 still clashes with other installations and system libraries like it clashed in prior versions for libmysqlclient.so". I usually was aware of mysql/mariadb having issues, but mariadb-vs-postgres was new to me.
Thanks for documenting your case so that users affected by a similar case can find it! I subscribed rbasak if there is anything he might want to share about the long term plan how good (or not) those databases will go together (he is usually looking for mysql). ** Changed in: mysql-5.5 (Ubuntu) Status: New => Opinion -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1759751 Title: mysql not downgrading to v5.5 after installing mariadbv10.2 and then purging it completely, mariadb service instance still clashing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mysql-5.5/+bug/1759751/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs