On the other hand, Microsoft was just a BASIC vendor, Amazon was a bookseller, Netflix was mail oder DVD company. Sometimes if you have a really good team/organization it makes sense to pivot based on the market.
I don't think expanding to other verticals is the same thing as a pivot, a pivot (imo) is when you entirely change your business strategy and product because the thing you were doing wasn't working. If you expand the definition of a pivot to any change in business strategy, then every company pivots all the time, and the term loses its meaning.