A couple of reasons - I switched from Pop! OS to OpenSUSE Tumbleweed, and the Docker version in the repository is 24.07 compared to 25.02 (the current version of Docker) with the official Docker site only supporting SLES on s390x, not Tumbleweed on x86_64. The main reason though is that it can run without root which is appealing; apparently I have a lot to learn on setting that up. The glib statements of 'drop in replacement' that I"ve seen isn't quite accurate apparently outside of the commandline options.