You make a compelling point, for sure. There are definitely features that fall into that category (eg page transitions), there are a lot of other things coming out these days that just make life easier.
For example, in chrome (and in the spec) you can now animate between ‘height: [number]’ and ‘height:auto;’ just the other day, I had to write a python function to estimate the highest of a menu based on its length * the line height of the list items, so I could provide an exact height to animate to. It works, but it’s hacky and gross. It would be nice to have access to the solution.
Came here for this. How can they legally use a headline like that. This is why we can’t have nice things.