Whispersync (Amazon's handoff product to switch from reading a Kindle book to listening to its Audible copy if you have both), but two-way for podcast episodes

Whispersync (Amazon's handoff product to switch from reading a Kindle book to listening to its Audible copy if you have both), but two-way for podcast episodes and blog posts. Subscribe to podcast feeds and/or blog RSS feeds. Podcasts get transcribed by some AI tool. Written feeds get transformed into audio. You can "highlight" in either one, using something like Snipd's system for podcast snipping (which you can easily go back and edit because you have a written transcript too). I read much, much faster than I listen, even on 2x speed or higher, and I retain it better, so the killer feature to me is more the transcript of the podcast than the audio of the blog post. Bonus points if it has e-reader-friendly pagination as a scroll option. And if I can self-host it if I want. And if I can export my notes. If I knew how to build things at all, I'd be working on it right now.