Bazzite is pretty great, but being an immutable OS has pros and cons, especially if you run into weird edge cases (unsupported hardware, weird sound issues, general weirdness). Because you can’t modify the base OS, you won’t have access to use “normal” methods to try and solve the problem whatsoever, as opposed to running a non-atomic Arch/Fedora/Debian-based distro where you have access to a full package manager and init/systemd. But if they’re on somewhat mature hardware, it’s basically an appliance that is significantly harder to fuck up.

If disk space isn’t a huge issue, my recommendation among friends is to use Steam in Windows to create Archives to back up anything you don’t want to spend a lot of time redownloading. Then, once in Linux, drop in a new SSD and/or make a new ext4 partition exclusively for Steam games, add it to Flatseal, then use Steam on Linux to restore from the archive file. After that, Steam will download the proton distributable and some Linux middleware, and you’re mostly good to go.

Takes a while to copy files to and from the archives, especially if one of those scratch disks is a SATA SSD, but always much faster than doing it over the network.