Podcasting as a Resurgent Technology: The source highlights that podcasting, despite being around since the early 2000s, has experienced a significant resurgence after a period where it "seemed to have faded for a while."

Potential Drivers for Resurgence: The text speculates on the reasons for this renewed popularity, suggesting it might be linked to people being "more siloed with their headphones on, while working out at the gym, or on treadmills, or drive time." This points towards the convenience and individual nature of the medium.

"Rebirth of Radio": A key question raised is whether this resurgence represents the "rebirth of radio." This comparison is further elaborated by the observation that podcasting is a "return to a radio broadcast style of communication in the middle of a video, livestreaming explosion," suggesting a counter-trend in media consumption.

Significant Economic Scale: The source emphasizes the substantial financial growth of the podcasting industry, stating that it is "producing - into billions of dollars and increasing." This highlights the economic viability and attractiveness of the medium.

Barriers to Entry for Burgeoning Podcasters: While acknowledging the potential for financial gain, the source also identifies practical challenges for aspiring podcasters. These barriers primarily revolve around the technical requirements for setting up and distributing a podcast.

Most Important Ideas or Facts:

Technical Requirements for Hosting and Distribution: The source clearly outlines the fundamental technical infrastructure needed for a podcast. This includes the necessity for "a place to host their podcast files, and edit the accompanying content, the artwork."

RSS XML Compliance: A crucial technical requirement is that the content must be "RSS XML compliant so that the podcast is Apple Podcasts compliant or it wont 'certify'." This highlights the critical role of RSS feeds and the dominance of platforms like Apple Podcasts in the ecosystem.

Hosting of MP3 Files: The need to "have your mp3's hosted somewhere" is presented as a fundamental step, with mention of companies that provide this service.

RSS Feed Generation: Aspiring podcasters must "have the ability to have an RSS feed of your podcast that Apple can pull from." This underscores the technical nature of podcast distribution beyond simply creating audio files.

Costs for Beginners: The source mentions that costs for new podcasters include "microphones and gear," in addition to the aforementioned hosting and potential editing software/services.