If you write a contract and give it to a lawyer with the instruction, "Anyone who satisfies this contract gets this money." And someone satisfies the contract to the lawyer's -but not your- satisfaction, and the lawyer sends the money, did the third party steal from you?
Imagine I write a contract and empower an AI to execute it. I put $10,000 in a bank account and write, "I'd like a nice car."
I do this of my own free will, at my own hazard. I know I'm playing this game. I have intentionally elected to use a system that will execute without any further intervention or oversight on my part. Verbally, I state that I am confident enough in the writing of my instruction that I feel secure in whatever outcome it may bring.
The system automatically executes and someone has sold me a very nice remote control car.
It's a stretch to call training an AI creating a 'derivative work' by the legal definition.
You could count the words in a book and publish the word count, and while the information is based on the contents of the book, that would fall incredibly short of being a derivative work.
I suspect they committed whatever copyright violation is committed when they downloaded the copyrighted works. Training an AI on them is simply not related to the protections that copyright offers.
I'm not even a Linux "enthusiast". I simply find Windows to be a terrible product and Linux to be a better product. I simply use the least terrible option.
However, I made some modifications to the theme for the first time recently, and learned that I absolutely hate Hugo's templating language. I might switch away at some point in the future (perhaps to https://github.com/getzola/zola -- the templating is Jinja2-esque).
I'm thinking about the motorcycle motor. If they're really lighter than competing motors, I don't see the downside of using them like a traditional motor, taking the weight savings, putting it inside a sealed cavity, and coupling it to a driveshaft. Simplifies some of the other problems with sealing and bearings mentioned elsewhere, avoids unsprung mass.