From TFA:

> Some time ago, we were made aware of multiple attempts to exploit our permissive licensing to hijack our work, with a direct view to replacing the project and aggressively monetising Linux on Apple Silicon. In some extreme cases, in-development feature code was being lifted straight out of our personal forks and published without attribution or lazily rewritten with LLM assistance to obfuscate its origin. The MIT licence explicitly allows this, and has no carveouts to protect against bad faith actors.

They are mad that vibecoders are building on top of their work, making real progress, then re-releasing it as "look it works" while containing a bunch of their work. Which is sort of fair but I don't get how that works in practice because in reality anyone can read the code which is open source and do whatever they want. Licensing won't stop them.