I think some demographic info can be useful in judging the potential uptake.
Apple iPhone ownership amongst USA teens:
2024: 87%
2019: 83%
2014: 67%
https://www.iclarified.com/95177/87-of-us-teens-own-iphones-...
https://www.pipersandler.com/news/piper-jaffray-completes-se...
https://www.pipersandler.com/news/different-new-cool-accordi...
Smartphone marketshare for iPhone in various countries:
65%: Norway
59%: Sweden/Japan/Canada/USA
49%: UK
30-39%: Germany/Portugal/Italy
other countries are lower from my random sampling of developed countries (South Korea is dominated by Samsung).
Source: https://gs.statcounter.com/os-market-share/mobile/norway
Change last part of url to get info for another country
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