Since its inception in 2008, Stack Overflow was hosted on bare metal servers. This year, we finally moved to the cloud and decomissioned our data center racks.
I will always have a soft spot for https://meta.stackexchange.com/ and https://meta.stackoverflow.com/ -- my activity in those communities led to @codinghorror hiring me in 2010.
And before the servers were scrapped, one of our SREs saved me the face plate of NY-WEB10, one of the two web servers that hosted those sites over the years. I love it