I'll never understand why a company has to keep growing. Obviously I don't have a degree in economics, but why can't a company do well and then continue being so without having the need to innovate all the time? Sorry if I'm missing something big.
A company has to keep growing because of unique demands on that company. A different company doesn't have to grow because it has a different set of demands.
Most you read about on here have a relatively similar set of demands based on the VC investments they took.