Imperial is intermixed woth metric in constructionnand a ton of engineering projects as materials are still manufactured in imperial measurements. Farming is still stuck in imperial too.
Both are still around because an entire industry changing fundamental measurements is a lot of effort.
My second favorite example of the two living in harmony for the average US citizen is the liquir store. Beer comes in ounces but hard liquir and wine comes in metric.
My favorite is soda, which comes in 20 oz and 2 liter bottles on the same shelf. People opposed to the metric system tend to ignore the fact that they are already using it somewhere in their lives and just don’t notice.