Steven Tyler can sing aswell today as he could when he was 20. He's probably used far more drugs than Jon has too in the past.

I do critise that things aren't as good as they used to be but it's common with artitsts that they're best days lie early on in their careers. They grow up in a specific genre of music which is popular at the time and then the genre changes and there is no longer a market for the genre that they are in.