"Nerds" are the group most adept at switching back and forth so your anecdote really isn't useful in the slightest. And the numbers really don't show a systemic move back to Android.
Also this group may be trend-setters because it does happen sometimes. But far more often it doesn't. Otherwise we would've seen everyone cancel Facebook, use Bitcoin for all payments and vote for Bernie Sanders.
> They are struggling at competing in the space of the biggest ecosystems around phones. Cloud, computational photography, assistant.
iMessages is a killer platform that only exists on iOS. iCloud simply just works for most people storing photos and backing up their devices. Portrait Mode has been a key marketing differentiator in the photography space. And whilst Siri isn't as good as Alexa/Google Assistant in some areas it is better in others.