> “I manage my Kindle reading list with home-made command line tools” is a very niche situation.

I don’t use a Kindle (it’s a Kobo, those are very hackable) and don’t use my tools to manage the reading list, I prefer to do that on device. But sure, I’m not claiming it’s for everyone, there’s a reason I recommend Calibre to other people. My needs are fairly minor, I don’t even use any of the popular alternative interfaces like KOReader.

> I’m impressed but also… that’s a lot of effort.

Not that much effort, and the tools have evolved as my habits did. I’ll give you one simple example of such a tool: I can select an EPUB and press a keyboard shortcut which actions it in Alfred to first convert it to to a Kobo EPUB with kepubify and then upload to Dropbox with rclone. I can then download it from the Kobo manually.

I had another which would take the URL of the frontmost browser tab, download and convert it to EPUB with pandoc, then it’d reuse the same kepubify and rclone steps. That one doesn’t work that well nowadays, with all the websites getting harder to access programatically due to all the LLM scraping.

Neither of those needs a lot of code, and I’m still relying on other tools for the heavy lifting. It’s just that for my specific personal needs, this is faster and more convenient than using Calibre.

Those came one or more years after Napster, when it was already wildly popular because it was the only tool that did that job.

Like calibre, I guess :)

They all came over a year or two later right?

The Kazaa people then used the same base to create Skype (which was "true" P2P for a long time). I'd say they've done pretty good.

Obligatory: I miss Rdio. That was them too.