I think fighting for the ability to write a custom OS for a phone misses the point.

It should be possible to participate in the modern economy using standard technology.

To this end, I think there should be a mandate that all govt and commercial infrastructure apps offer a progressive web app with at least feature parity with proprietary phone apps.

Want me to use a phone to pay for lunch, EV charging, parking or a toll? Great. It needs to be doable with anything running firefox, safari or chrome.