I learned cursive in grade school (I'm in my early 30s, so do the math). I haven't used it for anything other than my signature in 20+ years. The few times I've tried to write with it lately, I simply could not do it - the physical movement of my hand, the ability to fluidly connect letter to letter is very dormant, if not completely gone from me. I suppose it's a little sad, and I do buy the idea that writing in different ways utilizes different parts of the brain, but if I had the spare time and inclination, I'd rather try re-learning the foreign languages I studied a long time ago and neglected instead. I regret lacking cursive mostly because I think it would make my messages in birthday and wedding cards look nicer than they do now.
On the other hand, when I was in 3rd grade or so, someone - my mother or I, I don't really remember - had the bright idea to enroll me in an afterschool learn-to-type course at the high school. This was just before the age of personal computers for most people (we learned on electric typewriters). I'm guessing typing classes are part of the elementary or secondary school curriculum now (?) and kids these days are using computers before they're weaned, so maybe the ability just comes for them. But for me, learning the basics of typing at that age was without a doubt one of the best things that ever happened, education-wise. I'm not ridiculously fast, but never was a hunt-and-peck type(ist) either - it made the rest of my educational career and life so much easier. Practically speaking, THAT is a skill kids ought to be learning, if they're not doing so already.