It is very podcast like, though, @PrimevalStomp , probably by virtue of its venerable age. I know you don't like them, sorry! But the conversational medium, the expertise, the calm talking without intrusive sound design, and the sustained deep focus on a topic -- these are all features of podcasts, rather than (modern) radio.
Think about The Rest is History, Fall of Civilisations, The History of English... In Our Time fits right in to that. If anything, it's too short. But IOT has the advantage of covering much much more culture, science and philosophy, which is harder to find in one podcast; nobody else has the stupendous cultural reach of the BBC.
BBC programmes are mainly too short and shallow to make it as podcasts, and they are too fond of shouting and blaring noises which don't work in earbuds, but IOT (and I would say More or Less), both pass muster. And the Reith Lectures!