I think all non-Amazon readers support the full variety of ebook formats regardless of the source

Stremio, Cloudstream

And alternativeto.net is the place to find them alternatives

Transmission afaik does not have a built-in search functionality with plugins for popular trackers

The problem is, a lot of podcasts are using dynamic ads insertion, which means the ads are added on the fly when user download an episode. Ads length could be different from person to person, and there’s a possibility of empty slot too, where the podcast unable to sell the slot. “We’ll be back after this short message,” and jump straight into the next segment. No ad.

Omg that explains why I got an ad in my native language in Adam Conover’s podcast

Oh but this solution defeats the purpose of even using Kodi doesn’t it? This isn’t switching engines, but rather forcing Kodi to open files in an external application

that would be great, but how to do that?