We know where this is going, don't we? Offering interoperability in the beginning and then gradually taking it away - the old bait and switch trick. We consumers fall for it again and again.

I doubt I have a copy of it somewhere. Does anyone have / know of a copy of kindlegen for Linux anywhere?

Edit: Wayback machine has it, thank god. Had a very real sense of loss there. Unsure why it's a project I've hardly touched for years. https://github.com/wjdp/gotdict for the interested.