I am not really an Oasis fan like you, but
Here he is at 41
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What seems strange is that there are hardly any pictures which show early signs of thinning and then you suddenly have some where he looks like he is NW3. That´s why I though he was balding badly even though it started rather late.
What is really strange, in 2017 his hair looked like this again:
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I guess Propecia + hair transplant?
But I am sure Noel is also gonna start balding sooner or later if he isn´t on Propecia yet. I have seen this quite a few times, that the younger brother went bald first and the older one followed a little bit later. I doubt he is gonna be on that endless list of never balding rockers like Ozzy Osboure, Iggy Pop, Steven Tyler, Mick Jagger etc.