So I’m newer to Linux as a whole so some of this maybe a bit off but:

Immutable distros big difference is you can’t mess with the root partition ( you can there are just more steps involved), it’s read only. The advantage to this is it’s harder to fuck up your system, and it’s described as more secure. The downside is if you need a program that isn’t available in a flatpack, snap, or app image it’s a pain in the ass. Bazzite ships with distrobox which essential allows you to run a different distro in a container to use programs available to that distro, ex: you can run the Debian version of Firefox on a fedora system. Not all issues can be avoided with this, compiling code for instance is still a nightmare with distrobox

Now the good things: no live updates so an update won’t get messed up from a live install The system will update in the background and then when you fire it up next time THEN you are in the updated version. Bazzite is atomic specifically (an immutable subset) that applies updates all at once or not at all if it fails, you can also always roll back to a previous version at the GRUB menu. After it updates to the new image it then applies the local personal layers, so every update it kinda like starting with a fresh install

The main thing to look for is that any apps you want to use are supported in a flakpack, if all you are doing is gaming then you shouldn’t have to worry, both lutris and steam come with bazzite

Here is a link to a Lemmy post with community opinions on immutable distros