Every so often I rebuild Bertha, my computer.
That entails taking everything out of the case and installing at a minimum a new Motherboard, processor and RAM.
At issue is the 10 internal Hard Drives and all power and data cabling with attention to the air flow, direction and volume of all 11 fans and a multitude of BIOS settings to get a new Mobo to mount OS's ranging from Win98se thru a couple of Win10 test bed installs and finally some Linux OS's.
THAT is a several hour job. I could not conceive of setting up a Network that would allow a million or perhaps more subscribers to connect to.
My hat is really off to the technical and engineering staff
.