Was taught at school in the 60s in feet and inches, lbs and ounces, but we were taught Celsius when some schoolkids were taught Fahrenheit.
When it comes to cooking and recipes, its a very mixed world, bit of everything.
My weather hobby is a mixed world, we measure rain in mm, wind speed, gust and run in mph, temp in Celsius and cloud height in feet.
Having worked for a big US company most of my working life, with plenty of IT publishing that it entailed, Imperial was the way.
I still do everything in feet and inches and can roughly work out the conversion. I use google assistant on the phone/tablet often to make it easy.
Imperial is much easier to measure though in my view.