For #2, they are clearly not "supported" in a timely manner if we're waiting 2+ weeks for a patch.
It's still a pretty basic reason businesses might calculate that Ubuntu is a good fit.
When I interviewed with them a couple of years ago, I got the sense there was a lot broken with their culture. It was the best choice back when RedHat/CentOS stopped providing long term security updates, but now that Rocky Linux is around, it’s getting to be time to jump ship again.