Well, mostly. You still need to use Kelvin so you don’t get negative numbers for sciencing, but using them simultaneously for both day-to-day and science is nowhere near as common. Most people just want to know what to wear, and using Celsius loses a lot of the fidelity that Fahrenheit gives. This is after I spent 2 years only looking up the weather in Celsius so that I could get a feel for each degree of difference, and ended up just getting frustrated at how the same degree temperature in Celsius could feel drastically different to me when it’s actually a 2-3 degree difference in Fahrenheit.
Also, FWIW, British people love to use Fahrenheit when it’s over 100 degrees because it ‘feels hotter’ to say that than ‘37’, but they also love using Celsius when it’s below freezing, as it ‘feels colder’ to say negative numbers instead of numbers in their teens or twenties. It’s more psychology than anything, but Fahrenheit still definitely has its practical uses, and I’m not ditching it anytime soon.
We can ditch feet/yards/miles though. Meters definitely make more sense in that regard.