I think this is a symptom of the "release often" philosophy. With yearly or longer releases you could actually keep up and read the release notes. With stuff being released several times a year it's too much work to keep up unless you are deeply into it at the moment.

I notice the same with my Android apps. I used to read release notes of new versions but now I have it on auto update and am sometimes surprised that an app I have been using all the time has completely changed and I don't know how to use it anymore.