Comments by "Laurence Fraser" (@laurencefraser) on "Predecimal Currency: The Nightmare in Your Pocket" video.

  1. the older measurements are easier to make estimates with for most human scale activities... because they were pretty much all designed for precisely such tasks in the first place. the reason why there are so many different units with such bizarre conversion ratios is because they were never a single coherent system, but instead the formalization and standardization of many different systems used for many different purposes. the metric system, on the other hand, is designed primarily for ease of calculation (and the many benefits That brings) particularly in the context of science and mass production, paying only as much attention to practical day to ray use as it must in order to be usable enough to be adopted (for reference, only the multiples of 1000 are officially part of the metric system. the 10, 100, 1/10th and 1/100th units are unofficial additions adopted in various places (centimeters are super common. Centiliters, decimeters and deciliters, despite being Very useful scale units, rather less so).
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  2.  @filanfyretracker  American Customary Units aren't actually a 1:1 match for Imperial units. If I remember rightly it's mostly the units of volume that are actually somehow Worse than the British Imperial system (units with the same name but different sizes, less sensible conversions between units, etc) , while units of length are the same and I can't remember if weight was better or worse, but I belive ACU has less different units than British Imperail. From memory.
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