Ime you kind of do, at least did. I learned rust twice I think. First time it had a lot of time hype so I sat down and learned it. Then kind of like this rant never used it so it forgot it.

Then it came up at work and the language changed enough that I had to learn it again. Features were added, the "community approved" libraries changed, tools changed, coding conventions changed.

I never had that feeling with any other language I've used in similar ways. Javascript, ruby, python go I always felt like I could learn, stop using and come back to use pretty easily.