In a biography I read recently I saw a man described as a "lifelong student". It's very important to cultivate the habit of learning as a lifelong endeavor. There's no reason you can't continue to learn new subjects all through your life.
A school environment can provide structure and motivation to help you
focus your efforts. It's like dieting, or stopping smoking. Some people
can do it on their own, others do better as part of a group.
Hopefully we will see more experiments along these lines.
Hal