From my perspective, it always seemed that RHEL's big problem was that CentOS was easier to use. Whenever I set up a machine, I always reached for CentOS because to me it was the same thing, except I didn't have to ask for a license, I didn't have to securely store the license, I didn't have to enter the license, and I didn't have to document my strategies for handling those things.

It's generally also more reliable. In any sort of an org like setup, RHEL will be managed through Satellite. The new Satellite seems like a massive pain. The old one also had issues. Running centos compared to registering clients to satellite is a breadth of fresh air. Sometimes I wonder if RH creates complexity, and sells these overly complicated solutions to problems they create.