Is it ready for primetime supporting everybody’s random hardware and everyone’s software without crashes, stutters and slow downs or be free of the requirement for weird configuration tweaks?
Probably not.
Can it work perfectly well with a lot of hardware and a lot of situations for a lot of games Yes.
Is it ready for primetime on a steam deck? Yes.
Last OS change I threw bookworm on a random laptop asked it to install steam, enabled proton for my games and everything just worked. But that doesn’t mean it will work for everyone and for every game.
Mixing ram is one of those no-nos that a lot of us do anyway. Ideally everything just slows down to the slowest piece of RAM and everything runs fine. And you wouldn’t think that the board would care if you have 16s in one side and eights and the other. But if you’re having problems with your stability that’s absolutely the first place to look. Even if all the RAM is perfectly matched, from a stability standpoint it’s better to run two sticks than four. I’d pull it back to 16 and see if it stops crashing. If it stops doing that so all your RAM and get two 16gb sticks.