Linux

With NixOS you can upgrade your entire OS and if you don't like it roll it back like nothing ever happened. You can also replicate your entire machine by copying your configs over to another computer, running the install, and then copying over any files you have in your home folder and you will have reproduced your desktop.

You can also very easily use a different version of a packaged app by adding an override in your config. This is useful if you want bleeding-edge features or if something is broken. Also every package is also a development environment, so you don't have to worry about setting up a dev environment to hack on stuff.

Nothing, it's all Linux

You can't have your entire system configuration in a repository of plain text files, which has lots of advantages, but it's not worth caring about unless you feel excited to get into it.

Brag about being an Arch user (BTW.)

In my experience, not much, but I’m a marginally functional newbie. Mint manages things for you fairly nicely and has been the best, it just works with out messing with much/anything. (At least for my hardware)

I managed to get gnome working smoothly on mint and have been happy with it. I started and returned here since I last ditched windows as a native OS.

The only thing that has made me consider distro hopping from mint is AUR on arch and gnome, though I’ve been successful so far.

Part of trying the distros that are more advanced and give you more explicit control and configuration is the sense of accomplishment and it makes you figure out how and why things work the way they do. It holistically builds your velocity in your understanding of Linux. (Or gnu whatever that nuance is).

If your machine has enough resources it is super easy to host VMs of anything you want to try. You can try them all, and it won’t cost you anything but time!

I mean....

Steam? Maybe? I dunno, I don't game but the Steam kids seem to prefer Arch. I'm sure they have their reasons.

Practically? Probably nothing terribly significant.

Nothing, at all.
Some things you can't do easily in Mint, like create snapshots automatically and boot into them when something breaks.
But it's all Linux and freely available software under the hood, and the lines between configuration, customization and forking your distro are blurry.

You can't easilyy switch between different inages like on an atomic fedora system.

Do you have to switch now? No.