I have been on a customers site who had an NT4 server with over 1300 days uptime. By this point they were all too scared to reboot it as nobody knew how to re-install and configure the application it was hosting.
A couple of related questions?
My cousin once told me that starting up and shuting down a pc every day is bad for the system, not true surely?
Also, sometimes when I wake the pc after its been in sleep mode overnight a "system interupt" process uses up about 10% of my cpu unless I restart. What exactly is this?
Don’t know about the last one but yes, if you have mechanical drives in your PC then it’s physics. Spinning metal will expand/contract as it powers up and down. That and starting up/shutting down a computer bears most of the grunt on the PSU as well.
Keeping a HDD running is better for its health than daily shutdowns and bootups.
Obviously doesn’t apply to an SSD only system in the same sense.
I'd argue that those effects are completely negligible and in reality you would never notice any issues in the average lifetime of a box.