100%. Could not agree more. Not sure how they’d do that with the Resurrection Protocols now allowing everyone to be brought back in their prime, so would be even harder to explain why an almost 200 year old guy with a mutant healing factor is suddenly getting gray hair. But I have no doubt they could find some in-story reason for it. Maybe they even make it a gag, with him explaining that he’s been gray for years and finally just decided to stop dying his hair. I could see Nightcrawler or Gambit or someone having fun with that.
But I’m all for this. A grizzled Logan is the best Logan IMO (see my profile pic).