definitely going to take out the "it's not the 90s, use 64 bits” line out of this one. I was already unsure about it (because it's obviously not true, you should use whatever size is appropriate for your use case) and from the responses I don't think it's adding much

@b0rk I think there's still something useful to say here though. In the 1990s I worked on a system that used 32-bit unsigned as a millisecond timestamp. It would roll over after about 50 days. Our attitude was, "The system will never stay up that long." No longer! Maybe the line should be, "It's not the 90s, make sure you account for 32-bit overflow."

@stuartmarks @b0rk 10ms signed 32bit is about 250 days or about 9months. I know because one of the old SunOS 4 versions would hang up when the clock tick went negative.