Working from home has been around since the Brady Brunch and probably before, though it was more for lawyers and accountants who had their own business and decided to utilize a spare room in their home as an office until they could afford to lease a traditional brick and mortal office in more prime Corporate America locations. Beyond that, the first iterations of WFH were probably put in a bunch of hours at the office and then feel free to as much more work at home as you want.
|I could WFH in this office, if it also had a pool table|
At the Low-Rent Consulting Company WFH was limited to the rare occasion when I was sent to some north suburb job, finished up and there was no valid reason to make me return to downtown, i.e. only an hour left in the day. Usually they still made you come back to base because the EC was a vindictive troll who liked to wield her power.