@binarydigit I say go for it! Whether or not it goes anywhere, (re)learning things can be extremely rewarding on its own.
And programming-related disciplines are especially fun (to me, at least) since it's learning and understanding more about how things work. Peaking behind that curtain causes you to think a bit differently, and I think that's exhilarating.
Being able to use that knowledge to build stuff is pretty cool too, but I just adore gaining that kind of insight for its own sake.