There are plenty of supposed Steam Deck killers available in the portable gaming space, from the Asus ROG Ally to the Lenovo Legion Go and all the Ayaneo and ONEXPLAYER devices in between. But none of them have managed to outright slay the dragon that is the mighty Steam Deck yet.
I mean yeah, they just jumped in with random devices, tried slapping more powerful hardware in and windows. They want that quick buck off the back of the Steam Deck success.