My laptop has been up for 123 days. It gets put in standby when it’s not in use. I should probably reboot into a new kernel soon.
My desktop gets shut down at night because it’s power hungry.
My server gets shut down about once a year for cleaning and hardware upgrades.
You can get power strips that will sense the load on one outlet and shut all the others off if the load is below a certain amount. They are handy for shutting off those annoying standby LEDs automatically.