Debian may drop the SPARC architecture
Reported by LWN :
As of tonight, there is no more SPARC in testing. The main reasons were
lack of porter commitments, problems with the toolchain and continued
stability issues with our machines.
The fate of SPARC in unstable has not been decided yet. It might get
removed unless people commit to working on it. Discussion about this
should take place on #745938 .
It'll become increasingly difficult to use your old Sun hardware though. Debian and Gentoo were the only two Linux distributions left with SPARC support IIRC.