I'm not sure that Hobbies are an existential threat. We had hobbies before the Internet too. It is the non-stop rat race that is the problem. Before cellphones and email we went home from work and left work at work, for the most part. Find a rich life outside of work.

Here in Europe employees turn off their company devices after work. Getting called-in in your time off usually happens not more than once every few months. You're not supposed to check your messages in your time off. But it still feels a lot like described in this article.