I use it as a general purpose computer. I set up an encrypted home partition by more or less following this guide: https://github.com/hirak99/steam_deck_encryption. I have a bag that nicely fits the deck, charging cable, dock, and a 60% keyboard for travel.
I just picked up a 144hz USB-C 16" monitor with a magnetic cover like a tablet. Paired it with a mini tripod and designed/printed a magnetic bracket so the monitor just snaps on. Slides right into my tiny 13L pack (barely).
Happily, but… Of what exactly? Not sure if you just want to see layout, or the details of the 3d model, etc.
Same, I use it as my travel laptop. I like this keyboard + stand.