It feels a lot more stable than before, where every project had homegrown framework stuff on top of backbone.js or jquery, or then using ember.js. There was just an awful lot of difficult discussion on how to design event-bus abstractions, global state management and general architecture

To me it feels like the frontend ecosystem has stabilized a lot, since the react paradigm is very robust and versatile. For most difficult problems, the solution is somewhat clear. Sometimes more, sometimes less elegant, but at least the timeconsuming disussions have become less frequent within a team