I know SUSE Enterprise Linux is popular in the EU, but I’ve quite frankly had enough of corporate sponsored distributions. A few bad quarters and things could get interesting for the community oriented distributions.
I’ve moved back to Debian (with Flatpak) and will use the testing kernel for hardware reasons as soon as I remember where I put my notes on it or get tired and look it up.
Just because source is available does not mean it’s an open source license. It’s still proprietary, free to use for non-commercial use only.