I have none, but it's common sense that as guys age they need dont recover as easily, and if not given a lighter load their performance will most likely suffer at some point. I'm not saying anything groundbreaking or that hot takey.
But I'm pretty confident it's some combination of less overall minutes and more minutes vs non starter quality wings.
Exactly you have no evidence. Last year Joe averaged less mpg than two years ago, and had worse stats and thus there's evidence against it, if anything.
Who Joe plays with and plays against are likely the dominant factors. If we can maintain our #1 seed with Joe Ingles playing less minutes in the regular season then I'm ok with that. But come playoff time, Joe needs to be playing 32+ minutes.