we still have twelve numerals. we can still divide and multiply by 12 and its several bases. fractional measurement still makes more sense than decimal measurement for the overwhelming majority of everyday measurement cases that normal people face. 12 inches to a foot still makes sense today, 72 points to an inch still makes sense today, teaspoons and tablespoons still make sense today.

i'm not telling you the metric system should be locked away and never taught.

consider machining: the inch is divided into mils, each one one thousandth of an inch. for the precise measurement required in machining that measurement system (with base 10!) is perfect. but we don't need to switch to base ten for everyday stuff. in fact, so few people perform machining operations that it doesn't make sense to teach that system of measurement in schools outside of shop class. metric is wonderful for measurements that need to use compound units or can be huge or tiny and measurements that have no analog to human understanding like amps or volts. lets use it for what its good for.

please consider this from my perspective, having worked in several trades in the 21st century where most of the measurements, standards, processes and equipment are already established (worldwide, mind you!) and people come in with no experience in the field and suggest moving to a different system of measurement will make everything easier then suggest metric which has no fractional divisions, fewer divisible bases, requires conversion to interact with distributors and existing equipment and extensive retraining.

i was taught in grade school, just as i suspect you were, that metric is the universal system of measurement and that it's better because the tens make it easier. working with computers disabused me of the notion of decimal primacy and working in brewing, machining, auto repair and carpentry only reinforced it.

metric is not a more sensible, coherent system for the vast, overwhelming majority of people. it's optimized for some very particular uses that are unique to engineering, mathematics and science and was designed for that.