[jgowdy]

I think you'll find in the modern era / younger generation, running Ubuntu on the server is actually very common. Especially in the cloud. Most usage of CentOS I've seen in newer builds is strictly for hardware that requires vendor driver support, which is becoming more and more rare as vendors upstream their drivers.

CentOS was the server standard 10 years ago. And most of the downstream distros like Scientific Linux and Oracle Linux are dying.

80% of the world runs this, citation needed because I don't think that's remotely accurate and likely represents your personal bubble.

https://distrowatch.com/