I found, as an experienced Linux user, that with Bazzite you've got to forget the complicated approaches you're used to, and go for the easy one, it usually works. Lots can be done from KDE's system settings, or from the bundled utilities. Also I disagree with the order they chose for the application installation methods on their wiki, I think distrobox should be right after Flatpak.
I went from Arch to Fedora idk, I think over a decade ago and haven't looked back, not sure how things are nowadays, but I switched again this year from Fedora to Bazzite and I love it. Sure, you've got to learn to do things a little differently, but so far it's been great. And it forced me to use distrobox, which honestly I should have done sooner, it's absolutely great.
It's just an excuse to differentiate themselves, it happens in cycles, first they went with the "biological" label, but gradually every wine became "bio", so they found some other bullshit. Now that they've saturated that one as well, they'll find something else.
I doubt a custom build can manage a decent 6x6 setup, so it's probably terrible offroad.
Plus it would only be good in flat, open spaces, too big and too long of a wheelbase, the breakover angle sucks, and the approach angle does as well with the stupid grille.
It's an interesting build, but it's probably more art than function.
For development there's also Bazzite-dx