If the dude is so convinced he knows best, I invite him to write and manage his own kernel. Go for it. See how well your users like it when your slapdash execution breaks everything.
That arrogance and ignorance is just on another level.
If I'm Linus, i would have removed bcachefs from mainline already. From his reply he never once admit his attitude problem and keep thinking he is right.
This type of people can't work with others, not today, not in future.
Honestly, I am siding with Linus here. Mainline is not the place for last minute changes without testing. And it seems Kent isn't going to change his methods, etc. That and the retort was pretty disrespectful.
I have high hopes bcachefs can be something great but... At its current rate it's going to flame out before reaching its potential.