Interesting, I might have to contact Oracle support on that one (when I tried to install Solaris 11 on a client's server, I got a "your system isn't supported" error.
Support contracts have to be paid, or that's the answer you get.
"The Sun Fire server brand was a series of server computers introduced in 2001".
You think something from 2001 is old? What are you? 12?
Eh, it's past end of service life. Fine for a home or lab use, but, yeah, a 1280 is old. Beautiful hardware, built like a battleship. But at this point, having any of the purple generation of Sun gear in a datacenter is just a disaster recovery situation waiting to happen. So, old, certainly. Useless? Not by a far stretch. Just no longer enterprise-ready.