This is an idea making the rounds. The folks who write The GIMP are also doing it.
These super-capable graphics programs have simply gotten too complex for the "standard" interface to serve a lot of users well. But, as the article makes clear, removing features is almost never acceptable. So, the folks at Adobe are trying to find a way to allow you to customize the interface in such a way that you won't have to sort through a bunch of options and features you don't use to get to the ones you need. Yet they don't want you to lose features, so they'll all be there, somewhere, waiting on you to need them.
Interesting concepts to think about.