Canada has been metric since the 70's
I work in both metric and SAE
Somethings are funny how we do it.
Temperature, for the outside temp, metric. Zero is cold, 20 is nice, 30 is hot, 40 is F'ing hot!
Engine thermostats are in F, fluid temp gauges can be both but F seems to be the most popular.
I still work in 0.001" for close measurement and fine tolerances, I don't even have any fine measuring tools in metric other than a Vernier or 2.
Measuring out a piece of steel or wood will be in Feet and inches
Road distances are Metric Kilometers, but I still find that I will do the conversion in my head to miles
Weight, work in both, but once it gets too heavy I tend to want pounds and not Kg because I have to convert it in my head once it is over a few thousand kg.
At the store, I convert the weight from Metric to standard, real rough measurement. A 1/2 Kg of ground beef is roughly a pound.
The deli at the store is the killer, prices are in $/100 gm. So you look at the price and say I'll take 100 gm and you get 3 pieces.
Fluid is mostly metric since most of the container sizes we buy are all metric. As a bonus, only paying $1.25 for a liter of gas sounds way better then $5 a gallon
At work I have a complete set of SAE and a set or Metric wrenches and sockets, also own a complete 3/4" drive in metric and I have a few special sockets in 1" drive impact. Have taps and dies in both. Several sets of thread pitch gauges and such for trying to figure out what is what
The metric 3/4 drive hardly ever gets used.
Big wrenches are all SAE, plus some big adjustable's and pipe wrenches.
But I will tell you what I really hate. Manufacture's that use both. The engine is Metric, the frame is SAE, the inside of the cab is what ever was cheapest so could be just about anything. That is one thing that I like about Japanese or European machinery, every thing is the same, all metric.
I'm 60, grew up in standard and had to learn metric as it came into play. Hence wanting to still convert.