Market share is very important for investors as it's usually a sign of platform dominance.
So investors are troubled because Apple doesn't have the dominant platform. Android does.
On the other hand... investors can't put money into "Android" because it's not a company. It's a bunch of separate companies who only have one thing in common... Google's Android operating system.
Maybe they should buy shares of Google. But that's not really the same thing... Google's software doesn't do much without other companies' hardware (save for the couple Nexus devices)
Meanwhile... Apple makes the hardware and the software and puts it in a nice little package. That's a platform
Furthermore platform dominance attracts developers.
I'm sure you're aware that there are some developers who only make apps for the iPhone and that there are plenty of accessory manufacturers who base their entire companies on Apple products (cases, audio interfaces, etc)
And all that... when the iPhone has just 12% of the market. (in other words... the non-dominant share)
Why? It's because Apple is easy to make stuff for. They only make one or two phones a year. They're all the same size and shape. They've all had the connector in the same place.
If you were a case manufacturer... would you make cases to fit the 3 current iPhones.... or the hundreds of Android phones that make up their colossal 80% market share?
There are plenty of cases for the handful of top-end Android phones... but that's nowhere close to the entirety of Android market share. So in that case (pun intended) market share isn't worth a lot.
As for developers... I think they're already attracted to Apple's platform. It has proven itself by now.
If you were a developer who was asleep for the last 7 years and woke up to Android's 80% vs Apple's 12%... your first thought would be to develop for Android. Bigger is better, right?
Or is it?
and the same will happen to the smartphone market, where the iPhone and the iPad are too expensive (which isn't that bad, as the overall price is affordable for many).
Exactly... enough people can afford iPhones (more than enough actually). Apple has no trouble selling iPhones.
Why does Apple need to have products across ALL price ranges?