It makes a great deal of sense when thinking about the use case: recording a monotinic time in a computing environment with limited resources and extremely unli

It makes a great deal of sense when thinking about the use case: recording a monotinic time in a computing environment with limited resources and extremely unlikely to ever see files from before midnight of new years eve 1970. With a great deal of existing routines that work with those values and a good number of existing files and storage applications based on the simple version, it makes even mores sense to extend that in an unsigned way with a larger bitfield for any timestamp. Though as recently came up, leap seconds and synchronization could use a few bits to describe which timestamp is in use.