I highly doubt that I would own one.
Asus is jumping to the handheld device hype after Switch and Steam Deck. But Asus doesn't have the best track record with post release support and customization. I trust them even less with the overvolting scandal that just happened a couple of weeks ago.
If you compare spec only, Ally clearly wins over Steam Deck. But if you consider post release support, aftermarket customization, userbase, Steam Deck is miles ahead.