To be totally fair to SUSE, they do have plenty of notable contributions into the "RPM ecosystem". Libsolv, which SUSE wrote for their Zypper package manager, i

To be totally fair to SUSE, they do have plenty of notable contributions into the "RPM ecosystem". Libsolv, which SUSE wrote for their Zypper package manager, is also used by DNF for example. They also do plenty of kernel development -- not as much as RH due to sheer size, but still significant. Whereas Canonical doesn't really do any.