Funny I have exactly the same consoles as you. I mostly play on the steam deck now, usually inside the house, but I do bring it to work sometimes to play during my lunch break (depends on the game I’m playing at the time). When I play on the switch, I take it everywhere as I am not as scared to break it or have it stolen and it’s way smaller (I haven’t played on my 2dsxl in a loooong time but I use to take it everywhere).

When I play the deck at home, I play on it unplugged, then plug it when necessary, and keep playing (I usually play sitting on a japanese floor seat with the charger nearby so I can easily plug it in and out).

It seems in your wife’s case, the switch is better fitted. I have both SD and switch and I love the switch to play chill, short indie games. They run super well, battery life is great, the switch is super small, so it’s super easy to carry around.