why is the medium relevant at all? what does radio do that a podcast cant

A podcast requires thousands of pieces of fragile infrastructure between the sender and receiver.

Radio can send signals between continents with zero infrastructure between the sender and receiver.

AM RAdio also has the advantage of numerous AM recievers widely available. Good for mass communication over high population areas - particully in times of emergency. AM uses less complex systems to transmitt and recieve compared to other modulation methods, example FM. Transmission via internet tends to be much more fragile and breakable. I could easily build a simple (limited) radio, Crystal set in about a hour that would work in strong AM signal areas like in most cities or up to 50 milies away. AM radio also has range measure in hundreds of miles, much greater at night... Removing AM radios from Cars is alll about savig a few $ , probably like $20 for can makers.

You're making an apples to oranges comparison. If you can send a signal via a radio between continents, one can send a podcast using that signal with zero infrastructure between the sender and the receiver.

The throughput and bandwidth necessary for "podcasting" is many times greater than simple radio

Radio has an almost orthogonally inverse set of failure modes than internet streaming.

AM signals have a far reach and are often used for road and emergency updates.

Internet.connection (∴ tracking) not required

They live in different layers of "medium". This is like asking "What does piping do that juice doesn't?", they're not mutually exclusive.

It's not just the medium. Streaming from the internet is a totally different product than radio. There's no reason we can't have both.

AM is critical for emergency scenarios. When Hurricane Maria hit Puerto Rico, all our infrastructure was completely devastated.

The only way to receive news or bulletins for weeks was just one remaining AM radio station that kept broadcasting even as the storm hit and their building began to flood.

Work without internet infrastructure

Emergency broadcast is a big one, as well as location-specific information like road conditions.

>why is the medium relevant at all? what does radio do that a podcast cant

Deliver the news to you anywhere and everywhere with a receiver that can be built from scavenged garbage. Terrestrial absolutely still has a place, and will most likely outlive the internet.

Also, radio broadcasts a signal and is completely agnostic to who picks up the signal and listens. IOW, you can listen to radio without anyone/anything tracking what you. Not being tracked and data-collected for everything is still important to some of us.

what does a movie theater screen do that a phone screen can’t?

That’s right, nothing. “Movie theater attendance is well below pre-pandemic levels, with global cinema admissions hovering at roughly 64% of their historical peaks”

Yes, lower sales performance means we should eliminate all movie theaters so our children never have the opportunity to experience them. Profits are the only factor.

You’re right that experiencing a movie individually on a phone screen is the ideal medium.

I didn’t say any of those three things.

And I didn’t say “nothing.”

Count how many subscriptions are between you and that podcast.

It's literally absurdity that you even wrote this at all.