[Nifty3929]

There is not always a lot more to do. If your business is making typewriters then what? Or you mine coal that nobody wants to use anymore?

These companies could spin up entirely new lines of business, but why? It's much better for someone else to start that business and hire the best people for it.

There is no reason why businesses must continue growing, or even existing - even if they are run well and profitably. The universe changes, and business come and go to align with that.