[jniedrauer]

A more apt comparison would be Ubuntu vs CentOS (and amazon linux and all the other repackaged RHELs). Ubuntu definitely has more market share, but the OP implied that it was "just the way things are done now" which is not true.

The last data seems to be about 3 years old, and Ubuntu was about 1.5-2x the CentOS/amazon linux share. I suspect that's changing with the release of amazon linux 2, but there's no data to back that up.

Amazon itself primarily uses a RHEL based distro, which is what I meant originally.