Canada still uses both. Celsius generally for weather and fahrenheit generally for body temperature. Old habits die hard. I use both for weather and almost always Fahrenheit for body temperature. I do use Celsius more for physics unless it's thermodynamics....then I use Kelvin...same damn thing except I use what I find easier to think through...similar in some respects to picking reference frames except they are all on the same "frame" temperature wise.
I use kilometres much more than miles, but 90% of the time use inches, or feet and inches, when building something. Half my tape measures are in feet/ inches, the other half in feet/inches on one side and metric on the other. This can be a pain at times...I can't remember ever having an all metric tape measure, despite half our drawings being metric (mm). I probably could get one special order but I lose them, and they aren't readily available.
"Side" refers to different sides on the same face, not the underside.