Randall thought similarly: https://xkcd.com/1045/

I think there are places for both. However, reading up on a lot of business case studies, I noticed that a major tipping point for a company is often when they decide to step out of their niche.

Diversifying can handicap a company if they aren't careful, because it reduces resources to the core product.

However, it can also be a real boon (see: Microsoft + Azure, which now makes most of their revenue)