Tumbleweed got Gnome 40 stable before Fedora 34 was released and it’s been rock solid for me since day 1. And updates are generally extremely safe because if an update breaks your system you can just rollback to a previous Btrfs snapshot with one command and a reboot, wait a bit and issues are fixed very quickly.
While it was intended for servers, if you set it up right it can be an openSuSE equivalent of Fedora Silverblue, even better if you prefer Plasma as I do. It takes a little work to get to an exact equivalent (IIRC toolbox had to be installed and some extra set up after install).
Also to note, if you don't want a rolling version, Leap does offer a transactional server option in the installer.
I'm using a transactional-update based leap server for a container host right now and it's been awesome - I just upgraded it to 15.3 and seems to be working just fine as well.
I had installed / on an nvme drive which my BIOS doesn't boot from, so I have /boot on a separate partition. Breaks on every kernel update (although trivial to fix).
It's a pity because the fastest way to scare the average user away from Linux is to force them to open a shell in order to have a working setup. Hopefully that's something that'll change.
As a technical user, I enjoy it though. YaST is great for configuring many parts of the system, the documentation is great and it's stable. If Nix ever gets usable, I might give it a shot, but it's OpenSuse all the way for now [1]
[0]: https://en.opensuse.org/Additional_package_repositories
I guess the reason is that their corporate lawyers tell them that they must not do it. There might be patent issues buried in that code.
openSUSE has a nice pacing, it's new enough to be a great platform but it's not changing so quickly you need a fresh installation every handful of months or you're constantly fixing things. The tooling is good as well, there are some aesthetic things I kind of dislike (like some of the config files in /etc should be a layer deeper, ATMO) but it works well and it's well made. Major upgrades tend to work and aren't that scary.
The transactional system versions (MicroOS and then TW can be installed as "transactional") are potentially game changers. The snapper integration with btrfs and grub makes a really compelling case if you've ever needed it; btrfs seems like it's getting closer and closer.
This is my interpretation: If you go back to when RHEL was spawned, there were sort of two distinct styles of Linux systems, they were very much and east coast and west coast sort of style. UNIX dorks may disagree with this, but SuSe has provided something more like a European style. They have tools for updating configuration files and they provide some opinions on how things should be run. Once you get used to it and in to it, it's nice.