Mark Henschel wrote,

> But three quarts?
> If people accept 2.8 liters, and not the typical one, two
> or four quart sizes, one would hope they would also accept
> a three liters size.

I think part of the problem in the US of metrication is
conversional magnitude.
A major transitionary step to metric acceptance would be to
require legacy units and conversions to be “magnitude
compatible”—e.g., convert and express liters strictly as
quarts, not gallons, and meters as yards, not feet.
Likewise, the metric prefixes should be as magnitude
compatible as possible, too:

   oz.⬌dag;  floz.⬌cL;  ft⬌dm;  yd⬌m;  in.Hg⬌cmHg⬌kPa;

What is more conversionarily palpable—

   Gas:  “$2.00/gal. ≈ $0.53/L ” or  “$0.50/qt.≈ $0.53/L ”?;
  Food:  “16 Fl oz. (473 mL)”    or  “16 Fl oz. (47.3 cL)”?;
         “8 Oz. (227 g)”         or  “8 Oz. (22.7 dag)“?;
  Bar.:  “1021 hPa“              or  ”102.1 kPa”?;
         “765.3 mmHg”            or  “76.53 cmHg”?;
              (compared to 30.13 in.Hg)
    BP:  “115/73 mmHg”           or  “11.5/7.3 cmHg”?
              (compared to 4.53/2.87 in.)

     ~Kaimbridge~

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