The problem with the steam deck, is that it's roughly twice the size you think it will be, based on how it looks in pictures. You see it and you think "Nintendo Switch", but then it shows up and you realize it's closer to trying to hold a full-sized keyboard by its sides. The Steam Deck is more annoying and embarrassing to lug around in it's bulky case than to just slip a laptop into a backpack.
I saw an adult man in a kitty-eared hat trying to play a game on a Steam Deck in an airport once, and the only thought in my hand was "Dang, I'm glad I left mine at home for this trip." I hope they put it away before getting on the plane, because coach airline seats aren't really wide enough for somebody to comfortably hold a steam deck during a full flight.
So, maybe not many Steam Deck buyers would be willing to buy another one, regardless of how it performs. I know I for one wouldn't. Their effort would be much better applied toward shrinking their current platform down to a usable size, preferably with either a bigger screen or much smaller bezels.