I mean the simple one is. If you go to documentation and search for a class, it should probably sometimes find the class. It used to. Now the API documentation is completely worthless. That seems like a pretty basic one… That has been broken for quite some time now.
Simple things like finding the right file to include, can be a real pita at times right now. When you used to be able to easily look it up. Now if you search for a class, you get some high level overview only.