Every fighter gets old and Jones has lived like a rockstar methhead while being the best fighter on earth for a decade.
He will lose eventually, probably sooner than later.
But he's still easily among the GOATs and has a case for THE GOAT despite all of his bullshit life decisions.
If he lived clean (or even just cleaner) it's likely he'd be as close to being considered the undisputed GOAT as any fighter ever.
Jon might lose to Tom, but Tom wouldn't have had a sliver of a chance against Jon in his prime, and he'll never be a fraction of the fighter that Jon was, in terms of accomplishment, ability or significance to the history of MMA. Imagine if he wasn't a degenerate coke head.
Stay salty.