The cases are different. It was the original maintainers who forked MariaDB off MySQL over a concern for software openness, which sounds like a good reason to

The cases are different. It was the original maintainers who forked MariaDB off MySQL over a concern for software openness, which sounds like a good reason to fork. A python2.7 fork will have no reason other than "We don't want to use the new version of the language". I doubt if any Linux distros would replace their python2.7 package with the fork, even after the EOL of 2.7.