At one point I believe I read that the vuex API was still in consideration and that it may change. Recently I updated from 0.2.0 to 0.4.2 and there were some revisions to the API, which took some time to port over and figure out (for the better, btw). I haven't been able to find the message about the API possibly changing, do you consider vuex to be more stable now and less likely to have heavy revisions that require refactoring when updating?