I can't imagine playing Factorio on a Steam Deck, so I haven't gotten one, but it'd be nice to be able to being my factory with me on the airplane. I figure some AR glasses would make for a nice display, but the controls need most of the keyboard, the mouse, and as many mouse buttons as you can afford, and I haven't worked that part out yet.
This is a market opportunity. Screen real estate is solved; we just need a clever mobile keyboard/mouse solution. Maybe some sort of haptic feedback gloves.
Yeah, I don't think Factorio would be as fun on a Steam Deck.
That said, there are a ton of great games that are a ton of fun on the Deck, so much so that most of my gaming time is spent in bed on my Steam Deck, because the gaming experience is good and definitely beats going over to my desktop.