Neitheg the Imperial nor the SI system of measures are optimal. Had the French acadamy stuck with their first thoughts of basing the mwtric system on a numeric base of 12, we may have thr advantages of both Imperial and SI sytems. All it would take is adding two new digits for ten and eleven. Then we would havr a system that has single digit fractions for halves, quarters and thirds! Onr half would be 0.6, a quarter 0.3 and a third 0.4 exactly.
Other advatages include increasing 11 digit telephone numbers by ove 600% and probably avoided the need for IP6 internet addresses.
Then there is the more regular multiplication tables, and while still being able to identify even numbers just by seeing if the units digit is 0, 2, 4, or 8, we could even identify if a number is divisible by 3 as long as its units digit is 0, 3, 6 or 9!
There are many more advantages but not enough time or space here.