Have you looked at the Non-linear library? I find them far better than the otherwise-robotic sounding audio by usual TTS. Plus, it’s automated and podcasts are available pretty soon after any post is published. I like it as I like to go on long walks and listen to LW or Alignment forum posts.
Also, there’s an audio collection of the top-of-all-time posts from LW, the Alignment forum, and the EA forum.
I don’t have any idea whether people use that feature or not, but I definitely love it. One of my fav things about browsing gwern.net.
I was directed to the story of Clippy from elsewhere (rabbit hole from the Gary Marcus vs SSC debate) and was pleasantly surprised with the reader mode (I had not read gwern.net for months). Then, I came here for discussion and stumbled upon this thread explaining your reasoning for the reader mode. This is great! It’s a really useful feature and incidentally, I used it exactly the way you envisioned users would.