By "we" I mean ~everybody, as the Gregorian date with year 1 as the (wrongly dated?) birthyear of Jesus Christ is the standard for most domains in international communication.
>You don't think there aren't already application domains that have to account for relativity differences between reference frames?
Of course, GPS for one. My point is about the legacy of it all. Long time after those satellites are down, some future astronomer will be translating timestamps between GPS time and UTC, entirely aware of leap seconds and atomic time and whatnot, just to make sense of 21st century observations.
>You don't think there aren't already application domains that have to account for relativity differences between reference frames?
Of course, GPS for one. My point is about the legacy of it all. Long time after those satellites are down, some future astronomer will be translating timestamps between GPS time and UTC, entirely aware of leap seconds and atomic time and whatnot, just to make sense of 21st century observations.