Controversial opinion warning, and I would love to hear some counterpoints outside of my thought bubble.
I've never understood the appeal of Debian or Ubuntu, or I guess I don't understand why people would invest so much time in them compared to Fedora and Redhat. In actual buisness dealings Redhat has always led the way in enterprise (whole data centers), kernel development (a bunch of the maintainers work for them and they lead efforts like cgroups v2), and other highly technical pieces of the ecosystem, including acquiring all of the start developers (such as the systemd folks). Investing in Redhat is an investment into a deeper understanding of LInux through their excellent documentation and well paying positions through their famously good certifications.
There is of course a lot of debian and ubunutu out there in small deployments, usually individuals, small buisnesses, and education, but they are ultimately less lucrative and more oriented towards beginners/hobbyists. At least Ubuntu used to be. I'm not really sure who the target audience of debian is.
I've also never understood the appeal of .deb or apt, or what debians end goal is. They never seem to be doing anything that interesting except grinding away at repackaging everything. Canonical is just flailing to find some sort of niche and historically (Ubuntu phone, Mir, Open Stack, Upstart, probably snap) they are incredibly bad at finding relevance. I think having multiple packaging ecosystems is the stupidest idea in the world, and don't see the value add except giving people the illusion of more choices.