but for the future you never know.
I remember people desperate buying laptops with 3060 here and it was profitable at that time, the future is unknown, maybe our old cards can mine again, maybe consoles, who knows?
When I stopped my mining operations in 2018 due to market crash, I sold almost all equipment, thinking that at that moment everything was done forever, but I was wrong.
My family took to garbage more or less 15 risers cable, at that moment nobody would buy. But after 2020 I need to buy all the risers again, more than 200 USD of risers...
My old RX 480s and 580s could give me more profits than I earned when I sold...
Old motherboards with dated CPUs saved my mining some times, just to test or until my package comes...
So it's hard to say about the future.
For a short period of time I had a Steam Deck, it was a great machine, very powerful to a portable console, but I sold easily in a few hours, a person offered a lot of money

You can be sure in a few months some guy can make a miner to run on Steam Deck, because for now it's not wide available to buy, I think just last month Valve was delivering without lines.
yes we don't know about future but can't compare with 2018 we know ETH will back in some day.
but after the merge, ETH can't mine anymore it hard to say other coin can perform profit like ETH for miner.
PS. i think mine with game console or handheld it not good idea yet