Whenever I read these HN screeds against academia, I wonder what they are comparing it against. In my experience academia was way more interesting and fun than working as a professional programmer. The only thing good about the later is that it pays a lot.
However, Academia for the most part I think is just that sort of environment, I have commiserated with numerous PhD students who say the same thing. If one is into computers, both academia and computer engineering as career tracks are rather isolating, but some seem to like it, vs some get lonely, perhaps it's something psychological, and I'm not really intended to be such an introvert. Who knows.
I don't think academia is a bad career as long as one can get tenure at a good school, or in a good industry lab, so as to work with good people. I guess whether one can take it psychologically just depends on the individual.
Although I do agree that maybe if one had kids+wife or worked hard to be social, the 8 hours of isolation a day wouldn't be that bad. It might even be relaxing! So maybe professor is a good job for one in old age. But still I would worry about causing my students to suffer through isolation.
I guess I just wanted to caution people that a career in computers and/or academia can very isolating unless one picks the right path. Moderation in all things.