Can't you just give the information you are hinting at? Other people than OP read this. You basically tell me to go read thousands of messages on a mailing list just solve your rhetorical question. (answer: Intel, Redhat, Meta, Google, Suse, Arm and Oracle. There are much more efficient ways to find this.) Yes, they are the main kernel contributors and have been for many years. I'm still not sure I understand the comment.
I think GP answered as they did because there are so many examples it's hard to know where to start.
It's not entirely unlike if someone said "the only person I know writing books successfully is Brandon Sanderson." I do think "you ought to go check out your local book store" would be a valid response.
