Nothing is relevant outside of the steam deck. Steam is actively developed software that requires updating the kernel and dependencies on the device. All the hardware manufacturers like Asus are not using a dev team to maintain hardware compatibility and they will never fully mainline their source code.
It means all of the other manufacturer's hardware will depreciate quickly as software evolves in the real world. Hardware specs are a fallacy and completely irrelevant when the software they run is not static. When the software can change, the only relevant device is the one directly supported by those that maintain the software.