This is not a disruption. It is a return.
For a thousand years, every great mosque employed a muwaqqit — the timekeeper-astronomer who determined prayer times for that one place by observation and computation. The science had a name, ʿilm al-mīqāt, and it drove some of the finest astronomy on Earth: Ibn al-Shāṭir, whose planetary models anticipated Copernicus, kept the time of the Umayyad Mosque in Damascus.
The last century replaced him with national timetables — one calendar per country, bucketed by city, rounded to the minute. Useful administration. But the religious definition never changed: Fajr is true dawn at your horizon. Maghrib is the sun setting where you stand. When Dubai's scholars ruled that the upper floors of the Burj Khalifa break their fast minutes after the street, that was the tradition itself insisting the definition was always local and physical.
Computing it per person was impossible. At microsecond-class solves, it isn't anymore.