I'm amazed that Suse has $2.5B to buy themselves. It's a horrible OS to work with. Anything not based on Apt as a package manager is a nightmare. What does Suse bring to the table other than pain? It's not as easy as Ubuntu, and not as well-known or well-supported as RedHat (which is also a pain in the ass, but at least a well-known pain in the ass). Who even uses Suse?

I get the impression that people using Debian and their derivatives seem to live under a rock regarding other distributions.

I would trust zypper dup hundred times over apt-get dist-upgrade. This gets amplified by the fact that openSUSE Tumbleweed (rolling distro), is much better auto-tested before being published every week, than my experience with sid was (tested by their end-users).

Today's Redhat dnf package manager is based on SUSE's dependency solver (https://github.com/openSUSE/libsolv), and both package managers provide a very nice user experience.

People seem to be still confused about SUSE "using YaST". YaST is just a front-end powered by libzypp (https://github.com/openSUSE/libzypp), like zypper is.