I'm not necessarily comparing to WordPress. What I'm saying is that they should be going in the other direction; towards better backwards compatibility. Of cou

I'm not necessarily comparing to WordPress. What I'm saying is that they should be going in the other direction; towards better backwards compatibility. Of course, one way to achieve this is less reliance on add-ons, so you have less API surface to expose. Having a usable WordPress install relies so heavily on add-ons that it's kind of pointless to consider WordPress alone.