I live in the United States and although I grew up here using Fahrenheit, I switched to Celsius almost 10 years ago. Part of my reason for switching was the rest of the world was using Celsius and every time they would mention the temperature, I had no clue if that was very hot, or just right and kept having to convert, so since there were not that many countries that used Fahrenheit, I switched. I still know what the comfortable range is in Fahrenheit, but now I also know in Celsius as I use it every day. Also, I no longer appear to be an old curmudgeon that is resistant to using a system the rest of the world already uses.
Good thing I finally returned those 3 DVDs I had checked out. I had moved back in 2014 and had misplaced the DVDs, was using the streaming service instead of the DVDs, so I hadn’t really bothered to search for them, and then I just happened to spot them while going through some stuff and slipped them into the mail.