When someone is making statements about a global truth, such as the ability to be productive, experience is paramount. We all know you can pull off 80 hour weeks for a little bit before bad stuff happens, etc. It takes a bit of experience to learn what happens after a couple years of that.
When someone is talking about fashions or the popularity of new technologies etc, then being too old is going to make your opinion less useful as it's going to be harder for you to unlearn what you've already learned. This is generally far less of a problem and I really haven't seen much "This person is too old" on HN, but you do see it a lot on reddit as reddit attracts a very young crowd.
When someone is talking about fashions or the popularity of new technologies etc, then being too old is going to make your opinion less useful as it's going to be harder for you to unlearn what you've already learned. This is generally far less of a problem and I really haven't seen much "This person is too old" on HN, but you do see it a lot on reddit as reddit attracts a very young crowd.