No one bought them before, and since literally nothing has changed since then besides graphics card prices, no one will continue to buy them if they get re-released.
If their pricing and performance is comparable to premium consoles, and your whole Steam Library automatically carries over, I definitely think more people would be interested.
What's crazy was that they performed better than consoles at the time compared to price, and people still didn't buy them. So no, you're wrong people won't change and it still wouldn't sell
Well, for one, there has been a dramatic increase in the amount of compatible software, which has been a big factor in the success of the Steam Deck and was a big complaint about the original Steam Box/Machine.