@marquisdegeek I think it is extremely difficult to go against the mainstream.

I live in a metric country, but there are some things that are almost always given in non-metric units, such as power of vehicles.

For me it's extremely difficult to be metric-only, when everyone else (e. g. vehicle manufacturers) is feeding me non-metric data (e. g. through badges and spec sheets) that I have to convert first.

Same with dates ... I always try to use ISO 8601 dates when no date format is specified.