and that's a thing to me, IMO I don't think that there wasn't potential to make good mobile phone games... or say for developers of phone games to default to allowing a standard clip controller etc...

But even with the basic limitations of a phone as a controller, it's worth noting that the real fall of mobile gaming was just the rise of the shitty, microtransaction to progress games. That can be seen with the trajectory of even games that were origionally well loved mobile games, hopping on that bandwaggon (IE angry birds, plants vs zombies etc...)