I'm a sort of haematitite colour with silvery streaks, and I really love it.
For me there are several drawbacks to dyeing (and even more to dying ):
I have almost black hair naturally. Once it started to go grey, there was no dye colour that didn't add warm tones to my very cool-toned hair. All the colours looked much more unflattering than the grey. I could have dyed it black, but that would look awful, and like a teenager.
Dyed hair really always looks like dyed hair. If that's your look, that's fine, but I don't think it's necessarily youthifying.
As your hair lightens, so does your skin, and dyed hair often seems very harsh in comparison to skin tone. If you let your hair go grey, it will tone with your skin, and the white will reflect light onto your face - flattering.
But what's wrong with looking like you've lived a few years in this world. I'd rather any day be a young-looking older woman, than an older-looking young woman.