Calling Fahrenheit “deprecated” is not helpful, because where it is still used, there are no plans to change it.
And the same country also commonly calls Celsius degrees “centigrade”, so it is also not fair to blame the user for using that term.
And actually, both Celsius (centigrade) and Fahrenheit are weird shifted units, the only temperature unit that physically makes sense is the Kelvin (which is also the SI unit for temperature), though no country actually uses that in daily life. (But with that, there is yet another endless debate on whether one should write °K as for the other temperature units, or just K, because Kelvin is actually a real unit and not a shifted one.)
Fact is, at least last I checked, US TV weather reports still used the term “centigrade”, when they even bothered mentioning anything other than Fahrenheit at all.