Mine is in the picture: 1544 days and counting!
It's an EC2 nano instance that's used only as a monitor for a few services that are running inside my VPN. It has served me well over all these years!
EDIT: before everyone starts screaming about "security":
It’s not internet facing and no port is opened, all it does is fire up a notification if/when something doesn’t reply.
Even in the unlikely scenario that someone gain access to it that means that my VPN is already compromised, and I’ve got bigger problems to worry about.
Many years ago working for a monitoring software company someone had found a bug in the uptime monitoring rules where they reset after a year.
It was patched and I upgraded one client and their whole Solaris plant immediately went red and alerted. They told me to double it to two years and some stuff was still alerting.
They just said they’d try to get around to rebooting it, but it was all stable.
Everywhere else I’ve worked enforces regular reboots.