Oh but there was a metric time! Or at least a decimal one.
After the French revolution, some attempts were made to rationalize existing systems of time, the republican calendar [1] being probably the most famous, but hours and minutes were adjusted too [2]. Usage lasted slightly over a decade at the end of the 18th century.
With a decimal second at 0.84 a current second: 100 decimal minutes per hour and 10 decimal hours per day.
But, since alpha brainwaves (the most dominant) are almost exactly 10hz, regular seconds have a naturalness to them. Then again, maybe with decimal seconds, our brainwaves would adjust :)
After the French revolution, some attempts were made to rationalize existing systems of time, the republican calendar [1] being probably the most famous, but hours and minutes were adjusted too [2]. Usage lasted slightly over a decade at the end of the 18th century.
[1] https://en.m.wikipedia.org/wiki/French_Republican_calendar [2] https://en.m.wikipedia.org/wiki/Decimal_time