That's a popular misconception. We are actually pretty down with it by now, although we joke about not getting it.
Our local runs are all 5k and 10k now. My snowboard length is in centimeters, as are all skis. My ultralights were all sized according to your weight in kg. Even water and soda bottles have been sold in liter and 2 liter for years. I'm installing a kitchen right now with metric sizing. It's second nature, not a calculation anymore. Most of my mixing of epoxies and even grout is done in mls. Hell, even our drug subculture has been familiar with the gram and kilo for decades, lol.
The only one we have no real use for is Centigrade. Zero to 100 in Fahrenheit is the usual outdoor temperature range extremes, which is where we most commonly use it. For other temps, it's a little weird to have to insert half degrees to be as accurate as ours is without them.
eta: actualy, there is one benefit to Centigrade: I couldn't get the spelling of Fahrenheit right given three tries