The benefits of the metric system for the general populace cannot be overstated. The ease of converting between different magnitudes of a unit so that instead of asking for 150 grams or 0.15 kilograms of ham you can ask for 15 deca(grams), or quickly converting between millimeters, centimeters, meters and kilometers so that you don't have to deal with fractions of an inch to go lower or multiply by bullshit arbitrary values to go from inches to feet, yards and miles to go higher (or measure in hundreds/thousands of feet lmfao) is just invaluable and saves a lot of time and effort over years of casual everyday use.
It's baffling that the US and partially the UK are still sticking with the medieval ways, and when I see the lengths people there have to go for simple conversions I feel blessed to have been born in Europe.