[prisoner655321]

Hm. Not sure how it could be the case that not learning something takes the same amount of time as learning something. Can you think of any more examples of this? It would be great if I could learn those things; even if never have a use for it, it’s literally free.

[s1artibartfast]

Concurrent learning is the answer that you are looking for. Many activities take a certain amount of time but not 100% constant focus.

If it takes 10 hours of road driving to get comfortable and 2 hours to get comfortable with stick, you could do them both at the same time.