Special Directories removed from docs?

So it was recently pointed out on SO that the Meteor docs have removed the section on Special Directories such as client, server, tests, public etc.

Why is this? These are still directories that are treated separately and they really should still be explained in the docs. Yes This isn’t the recommended way to move forward but is now an undocumented feature of Meteor?

Link to old special directories

I was looking for that earlier, I knew I’d seen it somewhere!