Also worth noting that on Fedora, upgrades in place via the repository
(it's a simple dnf plugin) work great, and has for a while.
So, to the extent that Fedora developments often get rolled into RHEL
once they mature, that's also a good sign.
I have a prod server that's been upgraded each release from Fedora Server 17 up to 32. We've been waiting a really long time for it to show up down stream.