Back in 1987, I think, did 18 months working with a sister company, they were completely mac based (yes, they were a software house), all networked. Streets ahead of my home company*. It was my first introduction to word and excel and I've used them ever since (which is why I will not change to libreoffice, et-al).
* the small group I was in, and my business, was number crunching - the only way I could get PCs for the staff was building them and charging the bits to expenses with my director turning a blind eye. I worked on the basis that the most junior member of staff got the most powerful PC - 286s in those days, I had an 8086. We were using supercalc and word for DOS.