OpenSuse is not going to break new ground. It’s all about OBS and testing software before it hits their Paid Enterprise offerings. And they have almost a fully automated procedure for this. OpenSuse is not going to push Wayland only nor what will become the standard. It’s not in their ethos. OpenSuse is there to build SLE’s next release.
Debian being cutting edge?! Never. Debian is Debian, very slow to adopt anything. Debian is about offering a very stable release schedule. Debian will never push the ecosystem forward, it’s not Debian’s goal. You want a reliable system that just works? Debian is inarguably the king.