Alt-codes have been a figurative life-saver for me!
Like, today, it's 63°F and sunny.
° = ALT+Num0+Num1+Num7+Num6
In 3d printing groups, µ for µm or microns is ALT+Num2+Num3+Num0
Unfortunately, I guess these only work on PC and not Mac, but I do think most mobile devices have them hidden in some alternate keyboard option somewhere.
just get rid of °F and all the other antiquated stuff