SUSE is a great distro though and I'm happy to see this. Does anyone have any anecdata where they've seen it most heavily used?
In germany. It's quite widespread there in companies and public institutions. I prefer SLES over red hat/centos, but that, of course, is just a matter of personal taste.
I played a bit with Open SUSE on my home machine, I wouldn't use it a work simply because there aren't as many repos for the package mangager, for instance if you want to install kubeadm you would have to build from source.
Continental European enterprises.
When I was there, my laptop was a ridiculously overspec'd Windows system (with a high end Nvidia Quadro for unknown reasons), and they had us run a SUSE VM with IntelliJ for our dev environment.
Maybe you meant Böblingen. That used to be a big research and development site since the days of punched cards until its shutdown was announced 2 years ago. They did a lot of zSystem stuff, no idea whether anything with SUSE.
Disclaimer: I was a trainee at another IBM research site long before Linux was invented. So I cannot reveal any internals about the topic.
Example: https://newsroom.ibm.com/Bringing-Linux-to-IBM-Z This is very politically partner-agnostic but a lot of the work was specifically around SUSE in the early days.
Not really. Redhat and SUSE get named explicitly.
Edit: Ubuntu, too.