Most iPhone purchases in usa today are not based on careful evaluation and comparison with other phones. Otherwise us iPhone sales would be in line with the rest of the world, who were introduced to smartphones with other devices.
Look at other markets to understand what a legacy free smartphone market share like like today.
Other markets are very price sensitive, there is no new iPhone choice below $100. Where people do have a choice, point stands, many choose iPhone and pay premium.
That's not true. Apple has had a budget model every year for several years now. Nobody outside the USA buys it in any volume. Why? Because it is irrationally priced based on that phone's capability.
The truth is, if you want the best phone on the market, in any single area (battery, camera, screen, apps, usability, design) or all of them, it is not an Iphone. The only reason USians cling to their Iphones is because they are familiar with it. They are stuck with SMS and Imessage. People are risk averse and would rather pay more for something they know.
You cited the stats yourself. Do you think Germans are more price sensitive than Americans? Search for "poorest state in USA", and Mississippi comes out as one of the poorest in terms of median household income. That number is $44,717 for 2018. Now search for "iphone market share by state" and you end up on this page[1]: For iOS, the most popular states were Connecticut at 73 percent of respondents, Missouri at 72 percent, and Mississippi at 71 percent. Median household income in Germany is $46,278. But Iphone share is 30%.
Are you saying that marginally richer Germans are more price sensitive than the inhabitants of Mississippi? To the extent of flipping the market share exactly opposite of 70-30?