PickledLilly I hear you. I have a similar streak, in the same place, only wider. I have used root touch up on it for years, the rest of my hair is only slightly starting to go a bit salt and pepper. I'd been thinking of letting go since Christmas, and have now started growing it out during lockdown. Getting quite relaxed about it now. I'm 59.
I have wondered about getting the stuff for removing dye, to just strip the streak right down so that it looks like a real feature against the mainly drown rest of my hair. However, it would probably go orange...!