I recently "upgraded" an old 2009 Macbook Pro with Elementary OS, a fantastic Linux distribution. This led me down the distro hopping path, exploring way too many different Linux distros on my primary 2013 Macbook Pro using Parallels.
Then it occurred to me that to try out Linux on my iPad, just for kicks. Turns out it works great, provided you have a tool to run virtual machines and a Luna Display adapter. Above is a screenshot of my iPad displaying Pop! OS via my Macbook. Maybe this isn't the most useful thing in the world, but it's pretty cool to use my Apple pencil on Linux.
As an aside, my forays into Linux have been so enjoyable that I'm strongly considering switching to a System76 machine when my Macbook Pro kicks the bucket. I hope to hold out until System76 launches their first in-house designed laptops.