In regard to metric vs imperial, I would really like to see as much flexibility here as you can manage. Canada used to use the imperial system until they changed in 1970. However, not everything changed due to trade with the US. Plus, there's a few generations still alive that remember and prefer some measurements in imperial/US. This is further complicated on a personal level with the fact that I'm an American.
I had to give up on Fahrenheit for outdoor measurements, because I found in the first year living here (I lived here 20 year now) that I couldn't figure out what they were talking about on the news, and bank signs (although some used to show both) would show the temp in Celsius. Converting in my head got old fast. Yep, if you're really young, you'll be saying to yourself, "Bank signs"? What the heck's that old man talking about? For the kids, that's how us old folk used to find out the outdoor temperature when we were driving in our cars. We didn't have a cell phone that could tell us, and we didn't have the outdoor temperature on our dashboards unless we were driving something fancy like a Cadillac
I still like the indoor to be Fahrenheit. It's a finer scale for indoor temp adjustments, so my HE hub is set to ˚F. For wind I use Kilometers per hour, and for rain I use Millimeters. But for barometric pressure, I still prefer inches of mercury. Never could get my head around Millibars and Kilopascals.