> In his talk Predicting the future of the web at the last ReactiveConf, Richard Feldman (not himself a typescript guy, but an Elm user) quoted an interesting statistic that most of developers who try typescript never go back to writing plain javascript. I do not remember where that statistic was from, but can attest that with me it is the case.

Same applies to me, but on the flip side: Typescript (by its very name) is probably only going attract the kind of users who appreciate the kind of things that Typescript provides.

People who insist that dynamic typing is best, that compile-time checks of code is wasted effort etc etc are probably never going to try Typescript (and then go back to JS later on, and thus ruining the "never going back"-statistic).