Maybe it is just me, but it seems around the time that "responsive" became a term for layouts that adapt to screen resolution, the other term "reactive" which denotes UIs that represent some kind of live and changing data inline on the page was becoming a thing. It almost seems like that was the cool thing first and freaked out people, and now it is like there's an initiative to minimize "reactive" as a buzzword, and put the tamer "responsive" buzzword in its place... presumably while someone works on some kind of large "reactive" effort and then can announce their "big new thing" with their own term... anyway... i'm probably making things up :D