I understand where you're coming from, but I have a different perspective.

It's not much bigger than a Switch with a grip. I used it on my last flight to play Vampire Survivors and didn't have any space issues.

I use my Deck and Switch in bed. I use them on the couch when someone else is watching TV. I use them on the toilet. I use them while at the gym. I use them in my car while I'm waiting for an appointment or something.

Basically, I sit in front of a computer all day for work. I don't want to sit in front of a computer all night to game.

Yeah, they aren't as portable as a Gameboy, but they're good enough.