Every generation thinks they represent the pinnacle of enlightenment and achievement. Much of the older generation thinks things have gone to hell in a handbasket and think younger employees couldn't have any relevant experience or understanding, many of the younger folks believe anyone past a certain age couldn't possibly keep their knowledge up to date or have any energy. There is no reason to expect this pattern to stop.

I have yet to see a workplace where people didn't make judgments based on appearances. What is negatively perceived in some circles will be positively perceived in others.