Basically, the key benefit of the imperial system is to serve as an ego boost for Americans, which makes them feel special. Furthermore, it caters to their whole persecution complex, believing that the rest of the world is out to "take their guns".
Unfortunately, the truth is that no one else actually cares about their infatuation with old British measurements. Anyone commenting here in favour of metric, is only doing so because of how comically touchy and defensive they get as soon as the topic is raised.
https://www.leroymerlin.it/prodotti/finestre-porte-e-scale/porte-da-interno/porte-interne/porte-in-legno/porta-battente-strauss-bianco-l-70-x-h-210-cm-reversibile-36103746.html
The UK is a useless comparison, because everything was built before metric was phased in. Of course they still use feet and inches.
Unfortunately, the truth is that no one else actually cares about their infatuation with old British measurements. Anyone commenting here in favour of metric, is only doing so because of how comically touchy and defensive they get as soon as the topic is raised.