@Suiseiseki @skylar
> 1mL was defined to be 1 gram of water, but then it was realized that density of water ever so slightly differs depending on conditions

Bad faith example. The Meter is based off of an error. And, that error has been standardized. So, it can be used interchangeably with other systems.

They may have well made it the same length as a yard. But, they didn't because that would have actually been a useful and rational idea.

An extension of existing units, where everything is done in terms of base 10, to make it easier to work with quantities, both extremely large and small, would have been fine.

Honestly, just adding SI prefixes to empirical units would have added all the value they hoped to gain from the metric system.

Instead, introduced a competing system, with slightly different unit sizes for no reason, so that conversion between systems IS a pain in the ass.

The baked in usefulness of the traditional units lost. The need for hard conversions, added to ALL existing units. And, imposing strict adherence to a base 10 system, makes head math harder for common applications.

A system based off of foolish pride and ignorance, that created more work, for no benefit.