Slight mixing of signals here: Sharing that the personal reason is that you 'no longer feel safe' is going to create way more speculation and therefore more questions.
Tbh with all I know, this situation is very weird and may have signs of conspiracy. I personally wouldn't trust any sources, including the developer themselves. People can be pretty unhinged nowadays for pretty ridiculous reasons.
"For personal reasons, I no longer feel safe working on Linux GPU drivers or the Linux graphics ecosystem. I've paused work on Apple GPU drivers indefinitely.
I can't share any more information at this time, so please don't ask for more details. Thank you."
It takes a special type of person to be a Foss developer. There isn't a lot of pay and unfortunately a lot of people seem to feel entitled to your work. It's a hard thing to manage. I know the head of the project left because of that feeling. Not sure what this new departure is about exactly. Though it could be related to him just as much as anything else.