Honest question: other than the number of people using Celsius, what benefits does Celsius bring over Fahrenheit?
Even the scientific community felt the need to hollow out the Celsius scale, leaving the numerical values of Celsius in tact but otherwise completely decoupling the scale from the properties of water when it created kelvin. It instead moved to measured values, like basically all other SI/metric units.
Celsius is there to describe water. Well, it’s used to describe a mostly pure form of water. Well, it’s used to describe a mostly pure form of water at around sea level. So, why does that make Celsius more relevant or useful for temperatures than Fahrenheit?
Frankly, it feels like Celsius is, to the rest of the world, what the Imperial system is to the US: a vestige of times past that has been supplanted by a better, measurement-based standard, but has yet to be abandoned because it is so entrenched in popular culture.