In the early digital typesetting days, there were specially air-conditioned rooms about 12 feet square containing the computer. Designers sent a marked-up manuscript to the typographers, who would have someone code in the manuscript and send proofs by messenger in — what — two days, if it was a two=page manuscript. Then the designer marked them up for changes, called the messenger, sent them back and waited for the changes. Then... back, forth, back, forth... This was in the 1980s. Things were up to date! Final proofs were glued to white cardboard with wax instead of cancer-inducing rubber cement!
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The printers were told that you could not air-condition the press room (where the presses were) because the presses could not work in an air-conditioned environment. As if they ran on cathode tubes! It was all false. The real reason was that the rooms were huge, with high ceilings, and it would have cost a fortune, as they found out later.