Current distros doesn’t support many hardware platform, despite being very well funded. Compared to OpenBSD. (NetBSD is too much, right? and it is not really usable.)
Fedora: Only run on amd64, arm64, arm, ppc64le, s390x
www.openbsd.org/sparc64.htmlThe other architectures that OpenBSD supports have benefited because some kinds of bugs are exposed more often by the 64-bit big endian nature of UltraSPARC.
www.openbsd.org/want.htmlIt is important to spread sparc64 around the development community, since it is the most strict platform for detecting non-portable or buggy code.