Hi!
While reading the debian-devel archives for this week, I just found something
that might also be useful for anyone running Debian sparc and who wants to
upgrade to Debian sparc64 without having to reinstall.
It seems that it's actually feasible to upgrade from an older to a newer Debian
architecture if the CPU is compatible with both architectures. It's called
crossgrading [1].
Would be interesting to hear of the results for performing a crossgrade from
sparc to sparc64. So, if anyone wants to do that, please report back to the
list.
Thanks,
Adrian
[1] https://lists.debian.org/debian-devel/2016/12/msg00366.html