There are very few people that have the philosophy you describe. In the JS world, I think the Ember team has decided to do that. They have and are improving Emb

There are very few people that have the philosophy you describe. In the JS world, I think the Ember team has decided to do that. They have and are improving Ember with new technologies (virtual dom, server-side rendering) but it's still Ember and they take care of backwards compatibility (for the most part).