[amlib]

Steam Deck might be behind in terms of hardware but in terms of software it's way beyond your typical x86 linux system power efficiency, and dare I say it's doing better than windows machines with the typical shoddy bioses and drivers, specially when you consider all the extraneous services constantly sapping varying amounts of cpu time. All that contributes to make the SD punch well above its weight.

[sudosysgen]

My Alienware M15 Ryzen edition gets 7-8W power consumption by just running "sudo powertop --autotune". Basically all of the power efficiency stuff in the Steam Deck apply to other Ryzen systems and are in the mainline kernel.