It boosts your intelligence
This, of course, depends in part on how you spend your alone time. But chances are, if you’re spending a large stretch of time by yourself, you’re going to get a little reading done or practice one of your hobbies. Reading has a huge number of mental benefits, including staving off Alzheimer’s. And getting enough sleep (which is also more likely if you’re not making plans six nights a week) can also do a lot of good to prevent brain degeneration.