[lmm]

I'm glad they're willing to break compatibility to push their approach, because I think it's a better one. UTC with leap seconds is the worst of all possible worlds - not suitable for human time, not suitable for system time either - as perennial leap second bugs in such high-profile projects as the linux kernel demonstrate. Everyone seems to have agreed for years that basing system time on something without leap seconds would be better - whether that be leap smears or TAI - but no-one bothers to take action.