Funnily, in the U.K. we still use the imperial system in some cases, but now largely use the metric system. Weighing newborn babies, roads (distances), photo frames and some recipes are strangely still generally measured using the imperial system. I have to say though that using the metric system for most things is much easier - it’s a given that 10mm = 1cm, 100cm = 1m, 1000m = 1km. I was taught using metric at school so find imperial a lot more difficult, although I can use both. I don’t see why it hasn’t been adopted in the States yet, but then again, you can barely use PIN in the US yet alone contactless credit cards that Europe has now, so it doesn’t surprise me
As a Brit, I can say that this really isn’t a problem. We’ve adopted the metric system for many things but can switch to imperial easily. Weighing scales can weigh using both systems, measuring cups have both measurements, and we tend to use teaspoons/ tablespoons to measure small quantities of liquids (although I think that’s neither metric nor imperial). It’s really not hard to switch between recipes using the imperial system and those that use the metric system. If anything, though, the metric system seems to me to be far more precise than the imperial system.