I have a Game Boy Operator. It is a small USB-C device which holds Game Boy, Game Boy Color, and Game Boy Advance cartridges. It serves as a middleman between the cartridge and its computer app (or an emulator). With the device, you can take a ROM from the cartridge (including save data) or save data to the cartridge. While the Steam Deck is a neat device, I have no plans to buy one (note that my computer is attached to my TV and, for whatever it is worth, I always play my Nintendo Switch in docked mode). However, I had not thought of using it in conjunction with the Game Boy Operator. Very neat.