Kelvin mostly seems to be used to measure unimaginably hot (like ovens, metal forges, stars) or unimaginably cold (e.g. planets beyond Mars) things, Fahrenheit still exists only because the US Congress was lazy (though as an American I do find it somewhat useful for comparing weather and Earth’s climate zones in finer detail than just -1 in winter and 28 in summer), and I’ve never heard of that last one.
Kelvin mostly seems to be used to measure unimaginably hot (like ovens, metal forges, stars) or unimaginably cold (e.g. planets beyond Mars) things, Fahrenheit still exists only because the US Congress was lazy (though as an American I do find it somewhat useful for comparing weather and Earth’s climate zones in finer detail than just -1 in winter and 28 in summer), and I’ve never heard of that last one.
Kelvin is useful in physics because it’s always positive, reducing the amount of shenanigans.