[cirwin]

A failure rate of ~once every two years is so tiny compared to the rate of failure introduced by other things (from human error, on up); and for many time-related things being off by a second is irrelevant (or again tiny compared to all the other sources of noise in measuring time). So it seems reasonable to me to ignore leap seconds in the vast majority of projects.

That said, modern cloud environments do hide this problem for you with leap smearing [1], which seems like the ideal fix. It'd be nice to see the world move to smeared time by default so that one-day = 86400 seconds stays consistent (as does 1 second = 10e9 nano-seconds); but the length of the smallest subdivisions of time perceived by your computer varies intentionally as well as randomly.

[1] https://developers.google.com/time/smear