[Caprinicus]

This is exactly why I anticipate every grade school teaching kids Esperanto any day now

As someone who uses both but mostly metric, neither one is difficult to use. Metric relationships between volume and energy and heat are cool - but they are linked to the present day earth at sea level, which in the future might be just as archaic as Fahrenheit being linked to an erroneous human body temperature measurement

[SkyMarshal]

Are you saying we shouldn't continuously improve our scientific systems just because one day we might need to rebase it on Martian or some other physical constants?

There are two aspects to the metric system - the physical constants that the base measurements are derived from, and the mathematical relationships between different measurement scales, from microscopic to macroscopic.

The latter aspect will remain useful and sensible even if we need to rebase the former on something more appropriate one day. But that day is a long way off, realistically a century or more. Not a great reason.