For the moment, Devuan does everything I need or want. My main reason for wanting to be able to test other distros, etc., is that things change: that is, maybe in another five or ten years, Devuan will go the same way as Debian, or worse Ubuntu, and "freedom" will come to be redefined in a more commercially or politically acceptable manner. It's good to have options, just in case the winds start blowing in a different direction.
Perhaps you should have a look at https://distrotest.net. You can test other distros in a remove VM. You can also VNC into them if you wish. Cheers Michele