Lately I've come to the realisation that growing up means you simply can't maintain all your hobbies.

It's just not possible to play video games, and read novels, and read comic books, and garden, and cook, and blog, and play an instrument, and code, and paint, and sketch, and do photography, and do pottery, and watch TV, and ballroom-dance, and ski, and practice archery, and go to the gym, etc.

For the majority of people, apart from whatever you do for work, I think you can only really maintain 1-3 hobbies. People like those described in the article have chosen books/reading as their big time-sink. And that's okay, but I bet they're not spending a lot of time painting, or watching TV, or downhill-skiing (unless it's their job). Because there are only so many hours in a day, and eventually you have to specialise.