I've never had much body hair so I didn't have to shave my legs or underarms very often.
Around the age of 55 I noticed I was losing most of the little bit of hair that I had on my legs. Then one day I went to shave my underarms and there wasn't anything to shave.
The hair never did return.
Unfortunately with losing my unwanted hair I also lost some thickness of my eyebrows. I never had really nice brows to begin with but at least I could make do with just a touch of eyebrow pencil.
Now I have to spend a lot of time just trying to get my brows filled in and still keep them looking natural. I envy these women who have to get their eyebrows tweezed. I wish I had enough eyebrows to get tweezed.