Players like Nokia, Blackberry and Palm were caught completely flatfooted by the iPhone and later Android phones. They were still peddling "old" tech while other companies moved forward with "new and shiny" tech.
And they couldn't react in time. That's why Palm is gone... Nokia is basically a brand name... and BlackBerry is, well, I don't know what BlackBerry is today.
The good news for Apple is... they're still highly regarded in the smartphone game. It should be no surprise that some people LIKE the iPhone. A lot of people, actually.
While the entirety of Android absolutely dwarfs the iPhone.... the iPhone is still a 200 million units a year product. With massive margins too. No other company has those kinds of numbers. (Samsung sells more units... but at FAR lower margins)
Could Apple's iPhone sales numbers decrease rapidly? Perhaps... but I still think they are in a MUCH better place than Palm, Nokia and BlackBerry ever were.
I see your point though... incremental changes aren't always enough. But at the same time... massive changes aren't always good either!
It's "damned if you do, damned if you don't"
Apple does too little and people complain. Apple does too much and people complain too! It's a tough balancing act.
Your comment was a well-worded warning to Apple: watch out or you will become the next Nokia or some other defunct company.
But I've heard the same basic warning hundreds of times over the last 10 years of the iPhone... and over the last 30 years of the Macintosh.
Somehow Apple stays afloat. They march to the beat of their own drum... and fortunately they get enough customers to march along with them.
The same can't be said for Nokia, Blackberry and Palm...