A truck would deliver a Costco pallet of new tubes every week to replace the burned-out ones. That was long before Costco existed. "Costco pallet" is just the modern standard unit of industrial measurement.
Wow. I’ve never had to opportunity to see a Tube computer. Oldest I’ve seen was an 1970’s vintage Westinghouse computer which booted from punch card and used Drum memory. After that it was DEC PDP’s, and time marched on.....
.
You could heat a small city with the exhaust draft from a univac.
.