While I’ve no problem with the production of audio content, and enjoy my podcasts during my commute, I want to point out that listening isn’t more efficient for everyone and can often take more focus (also, there are D/deaf people to consider).
My retention goes way down when dealing with audio input vs visual (which is why I don’t listen to anything that’s geared toward teaching/learning). There are times where I’ll listen to segments of audio and not register a word.
I actually favor reading and visual over audio for anything for actual learning, and anything else is still a big “maybe” or can’t require much if any expectation of retention. And I’m far from alone. It’s call Auditory Processing Disorder and it can occur on its own or as a comorbid to other disorders (such as Autism).
So please, at the very least, be sure to include transcripts with your audio, or your missing entire segments of the population.