I wonder if the world will ever standardise to one or the other?

The . for decimal separator is used in English, as well as China and India but apparently that is only 35-40% of the global population. The , is used for 60-65%. Although the figures may not be accurate as a lot of countries seem to use both, with . used for international business.

Probably never be standardised as it’s pretty obvious which is which? 1,000,000.00 and 1.000.000,00 are clear because of the use of three 0s for thousands etc, and two 0s for decimals. But 1.001 and 1,001 are much more ambiguous and would definitely need context as to which system is being used - is it 1 thousand and 1 or 1 and one thousandth?