[khazhoux]

I'm surprised at the saltiness, jylam. I see nothing wrong in any of the quotes you posted. I think the author is reacting to two things:

* The meme that startups are a young person's game. Hell, some people even say that technology is a young person's game.

* The fact that most people do slow down in the second half of their career, for various reasons (kids, or because they've reached their financial goals, etc).

It's not clear at all why his post was offensive to you. Maybe what you're really angry about is the notion I mentioned above, which is unfortunately common, that people "age out" of strong or interesting work?