Rocky Linux is trying to specifically recreate RHEL exactly. That adds a new set of challenges that most people shouldn't care about.
If you want to create a derivative of any Fedora/CentOS distribution, that's not hard. But if you're trying to recreate, that's a different story. You have to care about things like build sequencing, NVRs, etc.
For example, if I'm creating Kudo Linux as a RHEL-compatible distribution by deriving from CentOS Stream, I only need to swap the branding packages and call it a day. The rest of my engineering effort can be spent in Fedora or CentOS Stream as appropriate. But if I'm creating Kudo Linux as a distribution that re-creates RHEL, then I need all the source packages to build, figure out build orders, and swap out branding. I also have to do my own lifecycling and validation. I am also now responsible for the maintenance of all the software and ensuring people get updates.
I would guess Suse is trying to do the harder one. I could be wrong, but I think the intended audience is people that want to drop RedHat and the associated cost, but with minimal changes to everything in their ecosystem other than the OS itself.
If Suse thinks they are going to make money in this space via support contracts rather than licensing, it's sort of a "commoditize your complements" thing...commoditizing the paid license subscription part. That's a guess though. It's not clear to me how they plan to make money with this move.
- damage and embarrass Red Hat, their direct competitor
- enhance their own brand, brand awareness, and reputation with customers of their competitor. Sell more of their own existing enterprise offerings as a result.
- create an alternative distribution that they can monetize if it turns out to be more popular than their own offerings ( even if only in one geography )
And in fact you probably won't create a perfect reproduction given you don't have access to the very complex RHEL build system. (CentOS didn't either.) Which makes some of the angst over just using CentOS Stream because it's not a downstream rebuild a bit misplaced.
If you want to create a derivative of any Fedora/CentOS distribution, that's not hard. But if you're trying to recreate, that's a different story. You have to care about things like build sequencing, NVRs, etc.
For example, if I'm creating Kudo Linux as a RHEL-compatible distribution by deriving from CentOS Stream, I only need to swap the branding packages and call it a day. The rest of my engineering effort can be spent in Fedora or CentOS Stream as appropriate. But if I'm creating Kudo Linux as a distribution that re-creates RHEL, then I need all the source packages to build, figure out build orders, and swap out branding. I also have to do my own lifecycling and validation. I am also now responsible for the maintenance of all the software and ensuring people get updates.
One is easy. The other isn't.