The special sauce of the Deck isn’t really what it’s running (it’s just Arch with some extra Steam stuff on top), it’s more that it’s something you can just buy and use without even thinking twice about anything - a more console like experience. To get a Linux handheld with that kind of performance before, you would have to go through all kinds of hoops and trouble to get it working (a lot of people aren’t ready to reinstall the OS on a device they just bought), plus a lot of games just would not work well. Deck gave pressure on game makers to ensure Proton compatibility at launch, as it gives them an established market who would appreciate it.
The special sauce of the Deck isn’t really what it’s running (it’s just Arch with some extra Steam stuff on top), it’s more that it’s something you can just buy and use without even thinking twice about anything - a more console like experience. To get a Linux handheld with that kind of performance before, you would have to go through all kinds of hoops and trouble to get it working (a lot of people aren’t ready to reinstall the OS on a device they just bought), plus a lot of games just would not work well. Deck gave pressure on game makers to ensure Proton compatibility at launch, as it gives them an established market who would appreciate it.