Re: Nair vs waxing
Nair doesn't get the root, only just below the surface level which is why its smoother than shaving. Waxing if done properly should last longer, but lots of cheap places rush through it, have poor technique and ending up with a lot of breakage, in which case they don't get all the roots either. Also with waxing, first session misses all the new growth that is shorter so those roots will still be there right after too.
My ex was an esthetician, in case you're wondering how I know all this stuff.