> Easy, we just kill off the idea of leap seconds.
OK, now everyone who cares how much time has passed in terms of the Earth's rotation needs to keep a time separate from everyone else. Astronomers come to mind, for example.
If anyone needs to know about the Earth's rotation that precisely they probably
- don't rely on their laptop's system clock,
- don't use UTC either because of minor rotational noise/drift and the discontinuity around the leap-second, and
- find the whole 24-hour clock thing a little useless, not being seasonally adjusted etc.
I bet they'd prefer TAI to UTC (or even "Google time"), because they've probably got their own timekeeping systems that will probably interact more smoothly (heh) with it.
More to the point, there are approximately zero astronomers on Earth, and approximately seven billion non-astronomers. Even if astronomers do prefer UTC, it's better to make them have their own systems to add or subtract twenty-something seconds from TAI than forcing all of my timekeeping devices to have a database of historical leap-seconds and an internet connection to hear about new ones.
Not to mention the fact that I can't write down what the time will be in UTC in 86400 * 1000 seconds... Absolutely ridiculous.
OK, now everyone who cares how much time has passed in terms of the Earth's rotation needs to keep a time separate from everyone else. Astronomers come to mind, for example.