One of the best things you can do is actually your habit, not anything with the actual Deck itself.
The Deck cases come with a pair of zippers.
To remove your possibility of accidentally moving the case while it's open and having your Deck tumble out (which has been done by a ton of people), get into the habit of closing it by meeting both zippers in the middle.
Once you are in that habit, that serves as your visual confirmation of the Deck case being definitively closed, as there's really no way to meet those zippers in the middle while the case is still open.
About to pick up your case, but don't see the twin zippers in the middle? STOP. Confirm that the case is closed before you pick it up and move it.
I know a lot of people recommend the "Deck Lifesaver," but it's really not needed as long as you properly use the built-in features of the case.
"I don't know, Doc. I think it started with my father. He said he was only going to Zeta Prioati to get some cigarettes, but then we never saw him again. I mean, it's only two light-years down the block, I thought he'd be right back. Stuff like that really messes you up when you're a kid, you know?"
For me, these are the kinds of things that are nice to have if my native screen dies anyway somehow, and I would have replaced it no matter what. The more options the better in that scenario.
But to change out the screen just because it's possible? Nah dawg I'm good.
A thing to do: Look up how to install Nested Desktop into Gaming Mode (a quick YouTube video will show you how to set it up in about two minutes). In short, it allows you to access most of the functionality of Desktop Mode when you need those things, without actually having to officially switch over (think of it as Gaming Mode's Desktop Mode Emulator).
Saves you bunches of time in the switching back and forth, as it's almost instantaneous. I use it all the time, as stuff like web browsers also work better on the Desktop side.
As for casual games you can play for short bursts and put to sleep whenever... you already mentioned Balatro, that's a great one. I love roguelikes and deck builders for this purpose in general. Recently, I've been playing a ton of Cobalt Core, I'd highly recommend as a great pick up and play and quick stop.
If you mean "check it five seconds per day because my extended family keeps a chat hub there, and I just want to make sure no one's reported an emergency," then yes.
One would think that out of all countries, South Korea should be the least worried about North Korean nuclear attack. They're next door neighbors a handful of miles apart from each other geographically, and wind exists to carry fallout right back to Kim Jong Un's house.
Same reasons it always seems so odd whenever Russia threatens to nuke Ukraine.
Take that link (Steam Deck page on the Steam store), scroll down a little bit. Red banner says "On Sale Through December 4th." To the right are the 64GB LCD Deck, which is out of stock, and the 512GB LCD Deck, which is still discounted to $336.75 and has a Buy Now button under it. I was, seconds ago, able to add it to my Steam cart and remove it.
Side note, the artist for these sales events this year has been smashing it. The winter main page is the best yet.