I would be interested in listening to an EM podcast, but it would have to be produced well with good editing.
Think of interesting ways you can subdivide an episode. Ideas:
Repair of the Week
Talk about a problem you fixed. What caused it, how it was remedied.
Mechanism of the Week
Talk about drop target banks! Steppers! Roto targets!
Interview one of the people on this forum about their collection.
There are only so many industry folk you can talk to, so this material would dry up fast. You might be able to get Wayne Neyans. He’s done other podcasts, but I’m sure you’d get familiar stories from him. Same with Steve Young or Roger Sharpe. You’d want to listen to their other podcast appearances to find a fresh approach. Other folk: Clay Harrell, Nic Schell
Make sure you know how to use audio-editing software to make your interview subject (and you) sound good. Use a good microphone. Et cetera.