[angleofrepose]

Or, better yet, a UI builder accessible through that "advanced features" menu that lets the user decide what is accessible and easy.

[TeMPOraL]

Or, in case of Emacs: just bind the M-x feature you're using to a key.

The overall principle is sound, IMO: present the "simpler" UI up-front to not overwhelm newcomers, but have advanced features available and a means to bring them up to front of the UI, for repeat users.

[snazz]

Like Firefox! I agree, that’s a very nice feature.