As an American

It would make it easier for future generations but imagine how much it would cost to convert it over

I've said it before but the UK just sort of went "eh, f*ck it." and has a mixed bag of metric and imperial measurements. They've taught metric for the last forty years but get into a car and hey presto! you are now driving in miles per hour and all the road signs are in miles. Just do what the UK did and keep road stuff imperial and gradually phase in the metric for other things like bags of sugar and groceries and stuff where the packaging changes anyway.

I actually like using both, kilometers for walking, and miles for driving.

It could take months, years to go from MPH to KPH changing highway at signs and fixing classrooms across the country...