i cannot speak for the ROG Ally, but one thing I really like about the Steam Deck is how comfortable it is to hold compared to the Switch.
also, with the switch, my hands start to feel numb after 20 to 30 minutes of playtime when I’m lying down on the couch or bed.
i haven’t tried it yet, but I will definitely give it a try, especially since i’m playing a lot of Tears of the Kingdom right now. thanks for the recommendation!