>A specified hardware platform with set performance does wonders for optimization That only works when you have a critical mass adoption like the X-Box and PS4

>A specified hardware platform with set performance does wonders for optimization That only works when you have a critical mass adoption like the X-Box and PS4/5, while SteamDeck is a bit far away from those both in sales numbers and performance wise. Most game studios still target the current gen consoles for minim performance specs, that even on powerful gaming PCs, the ported games still run like ass. And even those consoles are getting a HW refresh soon. So it's in Valves interest to update the HW to make sure that modern AAA PC ports can run on the SteamDeck.