What sort of evidence are you expecting there to be? A tool of thought would usually, uh, stay as thought. I'd expect a good percentage of APL users are using i

What sort of evidence are you expecting there to be? A tool of thought would usually, uh, stay as thought. I'd expect a good percentage of APL users are using it as such, but making a big deal out of that just doesn't really make any sense for any given individual. At least in the couple array language chat rooms I'm in, pseudocode-ish APL is somewhat frequently used to convey thoughts, and I certainly use arraylangs as such too. APL doesn't magically double your ability to think though. Pushing boundaries takes a lot more than raw thought power. And APL is used so little that you couldn't make any correlations even if APL increased thinking ability tenfold anyways. But it still is a very useful tool (among many other tools) from time to time. I personally don't see myself using any array language as a general purpose language for everything though. They're useful (extremely useful!) for things that map well to array operations or benefit from terseness, and anything from "meh" to awful for other things.