The weirdest part of this survey is in many categories, the most experienced developers (and by extension, the highest paid) were using a less popular technology. Over 50% of people surveyed had heard of ClojureScript and were not interested, but the developers who used it and liked it had the highest average years of experience and highest average salary. Same goes for Ember and Polymer for frameworks, and Relay for data store. I'm really curious what the reasons for this are.