1. you are pretending that all real time applications are equally hard, they arent, etherpad has a level of complexity beyond most things people do.
2. because people have been doing it for a long time means it isnt hard? there isnt any way to read that that makes any sense, brain surgeons have been around a while, its still pretty hard.
like most people who complain about buzzwords you are actually putting more emphasis on the 'buzzwords' than the actual point.