Location, location, location
Way back in the mists of time, my first 'real' computing job was as a programmer for a system controlling a repair workshop and it's associated stock of repaired and due in for repair items. It was that long ago that we were working with Dataflex 3GL under CC/PM on co-ax networked ICL desktop hardware. It was a small team with a couple of programmers, and an admin assistant who did a lot of the testing and all of the documentation.
The documents were created in Wordstar (as was the coding). Our admin assistant insisted on putting hard carriage returns on the end of each line, which was all well and good up to a point - that point being when changes had to be made. He would then re-flow each line manually from the edit to the end of the document! It didn't matter how many times we told him just to use wordwrapping, he never changed his ways for the rest of the time I was on the team.