I switched from Ubuntu to Fedora on my development machines and it has been amazing.

Stability is superb and a lot of the niggles I had with Ubuntu just went away.

Fedora Cinnamon is damn close to perfect as a development desktop for my needs. I literally can't think of anything I'd improve outside of its multi-monitor support (it's fine with fixed monitors but plugging my 4K on displayport on the ThinkPad requires some finessing but so did windows).

You are missing the point. It's not at all about Fedora itself here. What I was trying to say is that today CoreOS (even in) stable is using Linux kernel 4.14.32 (https://coreos.com/releases/) and therefore enabling deployments to use the latest and greatest features, performance optimisations and innovation from the Linux kernel community in enterprise environments. Going back to RHEL kernel would be a major step backwards preventing a wide user base from access to what CoreOS enables them to do today. I genuinely hope that CoreOS folks at RH don't give up on continuing to deliver this sort of innovation. That is all what I was trying to get across.

We really try to avoid being a "bleeding edge" distro, and prefer to focus on leading edge. We don't always do every thing absolutely before anyone else; we try to be the first to provide integrated, tested, usable versions of innovative open source.