Ronnie Coleman got better with age, until he broke everything. I believe Vince Taylor didn't start bodybuilding until 28, and looked good in his 50s. The Ageless One competed until his 60s, and looked better than many bodybuilders do today in their 20s and 30s.
I think variables of drugs, genetics and when and how long you have been working out need to be taken into account.
This is where it just gets all muddy, though: reaching potential vs. muscle maturity (i.e., aging).
Once Ronnie filled out (Sandow #1, say), he didn't "mature" beyond, not in a good way. I think most would agree he never again looked as good as he did in '98/'99 or whenever. Taylor, I don't know, can't remember.
And if "Ageless" is Beckles, would you say he got visibly better until 60, or did he just hang on, like Dex? I will say Haney looked best his last year; but he was still fairly young, and even admitted he "finally figured out how to peak," for what it's worth. Imagine he too would've probably declined progressively thereafter had he stuck around.
More importantly, though, what about the vast majority? How many honestly get better and better once they turn pro? Seems the exact opposite to me: They come on strong, maybe improve for a couple years, then begin the descent.
