",,,heat is the enemy of electronic life..."
No, it isn't heat as such, but thermal cycling. They're all on UPSes so I don't worry that much.
Most modern systems put themselves in a low-power mode anyway if you don't use them.
I have a crapload of computers running a variety of OSes and I rarely shut 'em down or unplug them - they just go to sleep.
Its really only Windows that often demands a restart if you install some new apps.
Linux or BSD only if you are going to change the kernel
My (somewhat modded) Mac Mini has an uptime of nearly a year (when I installed High Sierra)
I haven't checked the NAS boxen, but they must have uptimes of well over two years
(last time I rearranged the MacLab)
Mac