1. Hardware requirements increase with time while the platform being verified against remains the same. They may run... just not well due to hardware limitations
2. Varies depending on how many games implement incompatible things like certain anti-cheats. Admittedly, this may only account for a small amount. They come/go in waves -- eg: looter/shooter trend
3. Steam Deck verified is a more strict qualification than Linux in general; tiny screen/resolution, gamepads, etc.
4. Finally, inconsistency between the rate-of-verification and rate-of-addition - these are not locked
Probably more, these are what immediately come to mind
2. Varies depending on how many games implement incompatible things like certain anti-cheats. Admittedly, this may only account for a small amount. They come/go in waves -- eg: looter/shooter trend
3. Steam Deck verified is a more strict qualification than Linux in general; tiny screen/resolution, gamepads, etc.
4. Finally, inconsistency between the rate-of-verification and rate-of-addition - these are not locked
Probably more, these are what immediately come to mind