> So another option is to adjust to 1/100 second every few months That's pretty awful. We have a lot of systems now which care about duration. Any scheme tha

> So another option is to adjust to 1/100 second every few months That's pretty awful. We have a lot of systems now which care about duration. Any scheme that makes a time span unpredictable will cause problems. Doing it more often means more problems. The only improvement is that you hope that the things that care about 1/100th of a second differences are rare enough that disturbing thing many times more often is a good tradeoff. This isn't a good bet especially because at time goes on we build faster and more stable systems that care about tighter and tighter synchronization.