It used to be that it didn't matter who you were - the distribution channel was all that mattered. For example, MTV could make you famous in an instant, but the second the channel let you go and replaced you with the next flavor of the week, you were out of luck.
More recently, we've moved to a model where the platform and medium are less important than the personality. Think Joe Rogan, who pushes his podcast out to every channel possible. Or Barstool Sports, which has various content in the form of podcasts, blogs, YouTube videos, etc.
These power law podcasters (Joe Rogan, Tim Ferriss, etc.) can make more money on their own than through exclusivity with a distribution network. But they are few and far between, and require an entire support system to handle ads, cross-posting content, business admin, etc.
So it seems that the majority of full-time podcasters and content creators, after attracting an audience, will move back towards a walled garden of content.
If you're a creator making a living off of your work, would you rather spend 75% of your time on business admin and cobble together your income through ad and merch sales? Or sign with Apple or Spotify, collect a salary, and spend 100% of your time creating art?
We haven't come full-circle, though. While these creators are locked into the platform, people are coming to the platform for the creators themselves. The creators have far more power than they used to. But the consumer has to pay for a "cable package" of podcast apps and video streaming apps.
Corollary: Lots of people no longer root for teams, but for their favorite athletes. I see a ton of this especially in the NBA, where people are LeBron fans first and just root for whatever team he's currently playing for.