Think of it as a spectrum (I think I'm towards the infrared, unless they're measuring from the other way, then I'd be ultraviolet.. I know some of the things that others experience (stims? I'm not even sure what that means) I don't have, but a lot I do. It's not progressive, at least as far as I know.
With all the traits I exhibit, I'm definitely AS, self-diagnosed (the other possibility is called Medical Student Syndrome, but there's just too many 'positive' matches for it to be coincidence. While I can be funny (about every 3rd week), and talkative (sometimes too much so), it's been very helpful to me (why I'm such a dodger in supermarkets, position hand trucks to block people from me, etc...it just all starts to fit)
Once you learn what the signs are, you can learn to cope with each of them, and live a more 'normal' life. It takes a little more thinking things out before you do or say them, but it's got possibilities. It's what I plan to do