The linked message says it could come back as sparc64 - the Debian port was a 32 bit userspace, optionally 64 but kernel, while on new sparc machines you probab

The linked message says it could come back as sparc64 - the Debian port was a 32 bit userspace, optionally 64 but kernel, while on new sparc machines you probably would want to use sparc64 userspace. For embedded/fpga sparc it is less clear. Anecdotally though I think there are more NetBSD/OpenBSD users on sparc than Linux.