This is one of those things that probably should be standardized the world over.
The US should have made the switch to Metric mandatory in the 70's, rather than voluntary.
And the
decimal point should everywhere be the
decimal separator, and the comma the thousands separator.
(As most people are right handed, and as such shifting gears with the right hand make a LOT more sense, the world should always drive on the right, as well. But that's probably too much to hope for in my lifetime eh?
)