Regarding Seinfeld: Have you seen his tour schedule? [0]
He's still working extremely hard as a standup comedian. In interviews I've heard him say that he likes to keep his routine 90% the same, refining it from show to show, while still adding some new stuff. I watched a one hour show on youtube from 3-5 years ago, and I saw him live less than a year ago here in Sweden. Almost all the material had changed, which tells me he's still working hard. In general, these type of people don't just retire - this is their life.
He's still working extremely hard as a standup comedian. In interviews I've heard him say that he likes to keep his routine 90% the same, refining it from show to show, while still adding some new stuff. I watched a one hour show on youtube from 3-5 years ago, and I saw him live less than a year ago here in Sweden. Almost all the material had changed, which tells me he's still working hard. In general, these type of people don't just retire - this is their life.
0: http://jerryseinfeld.com/