I was a big SPARC fan. I've still got two old Sun Netra sparc64 1u servers in my basement. I used to have used sun workstions, and even had MidnightBSD running on some Sparc64 systems early into my project.
The problem is that when Sun was sold to Oracle, they closed up patches, documentation on old hardware and anything useful for supporting old Sun hardware. That meant that the used market dried up. They then put out only super expensive systems and got rid of workstations. This caused developers to lose access to modern systems and most ports of Linux and BSD gave up over time. Now you have to run Solaris on Sparc and you pay a lot of money to do so.
It's just not worth it. Solaris has lost momentum due to these moves. Everyone moved to Linux or BSD. It's over guys. Just give up and push Oracle databases on Linux and Windows now.