Almost to a man (person?), these are not great musicians in and of themselves. That is why, for example, musicians with actual exemplary musical talent (jazz musicians and classical composers) were better as they aged in comparison to pop/rock musicians.
It's not impossible for pop/rock musicians to make excellent albums after their time, but it's very rare. That is why special mention is made if it happens.
Of course the better artists of the current moment are making albums far better, by and large, than the current albums made by the dinosaurs. This is *their* moment. And in 20 years, the best of then will be better than the best of what the people now are doing, if they're still doing anything.