This is the real reason why CEOs are on a never-ending quest to grow even if it's detrimental. They are measured and compensated on share price. And share price is mostly driven by growth prospects. This is the real reason why Apple needs things like 3 camera lenses (just like Gillette needs 3 blades) and thin isn't thin enough. If you're a private company, you can do things like Hacker News and Craigslist where you don't change for the sake of change.

EDIT: to show the impact of growth prospects: Right now, Apple's P/E ratio is 20x with share price of $243. But in 2016, P/E was 11x with share price of $100. That is a 143% increase. If you look at revenues, 2019:$259B compared to 2016:$216B - which is only a 20% increase. Look at the article[0] from 2016, it says stuff like:

Apple shares are tanking this week because of a report in Japan's Nikkei newspaper that Apple plans to slash its output of iPhone 6S and iPhone 6S Plus by 30%.

That comes on the heels of an Accenture report warning that demand for smartphones is waning. People don't believe the newer models are all that much better than what they currently have, so they don't want to pay for an upgrade.

[0] https://money.cnn.com/2016/01/08/investing/apple-stock-100/i...