I stopped salon-dying my hair at the age of 49 and never looked back. I got sick of spending all the money, only to have grey roots in three weeks anyway. And I developed an intolerance to commercial hair dyes.
I did get the 'it's so aging' comments and the backhanded, patronising, 'Ooh, I wish I were so brave to let myself go before the age of sixty,' or 'I'm not brave enough to go grey yet, ha ha ha!'
I got a lot more resistance and sarcasm from women than men, tbh. I don't think men actually care but some women of my acquaintance saw it as an affront.
I did have people ask me innocently if I was retired.
Then I had a significant professional engagement that involved lots of public speaking and I, alas, caved to social pressure by using a henna/indigo dye that I could do myself very economically. The compliments I got, ironically from older women who themselves had grey hair!, were very telling and sadly ironic. 'You look so much younger and better this way. It's very attractive.'
Make of that what you will. I admire those women who don't cave to social pressure. But I will never return to salon dying, whatever happens!
OP, you make the rules for yourself. I will always respect other women's choices!