Ableton (music prod software) takes an approach to learnability that works well -- by default there's a dedicated UI element that shows documentation for whatever you're mousing over.

It doesn't remove the need to read docs, especially for people who are new to DAWs, but it does alleviate a lot of the intimidation factor and initial learning curve that can come with needing to find what you need to read in a manual for a complex piece of software.