Metric is quite simple & straightforward.
1.7 cm = 17 mm = 11/16"
2 cm = 20 mm = 13/16"
If you're doing math with a calculator, do you want to use decimal points or fractions?
0-100 C freezing point of water to boiling point
The best argument for metric is that we live in a global market.
"For the sake of accuracy and international business, more manufacturing companies like IBM, Xerox, Caterpillar, GM, and Black & Decker are using metric." May 24, 2021
We're partly metric anyways. So why not go the entire way? 1.2 L Mirage - I don't care how many cubic inches that is, but I can tell you 1.2 L is 1,200 cc without using much brain power.
I've been buying 2 liter bottles of soda instead of cans lately.
Tire width is expressed in mm, and the rim size is in inches. Seems silly to me, but that's what we do!
165 mm wide tire is 16.5 cm. It's so simple. Saying Mirage tires are 6 & 1/2" wide does not sound better to me?