That's why I made a distinction between civil time and atomic time. If you're doing stuff with enough precision that differences of parts-per-billion matter, th

That's why I made a distinction between civil time and atomic time. If you're doing stuff with enough precision that differences of parts-per-billion matter, then use SI seconds, which aren't changing. But civil time is for stuff like "what is the current time right now?", a question whose answer hardly ever needs more than 3-4 digits of precision. Getting rid of leap seconds entirely just seems lazy, kicking the can 600 years down the road with some nebulous "leap hour" concept. Especially so when there is already a timescale without leap seconds: TAI. I'm not surprised this proposal came from the US... "let the next generation deal with it" seems to be our solution to most problems.