Your comment made me remember netcraft.com which was the tool we always used to see which web server and OS was running a site. There was a running joke back in the day on slashdot about "BSD is dying" as Linux started to take over, based around Netcraft which used to publish a report showing which servers were most popular. I'm glad to see they haven't changed their logo in 20 years!
Their site report used to show an entire history so you could see every time they changed servers but it doesn't look like it does anymore. Now it's running in AWS so certainly not the same Solaris server. Although those E4500s were built like tanks so it could be plugged in somewhere...
https://sitereport.netcraft.com/?url=https://www.spacejam.co...