It has pretty much gotten to that, hasn't it? One metric to compare Leo and another for everyone else - I think that's pretty fair since the gap is sizable, IMO, yet shouldn't diminish the quality of other world class players.
It's simply an exceptional age headed by a unique player
We talk about this on occasion with other culés as to how he might suddenly fade. Would it be injuries, boredom, boozing, bimbos etc.? I wondered when his girlfriend got pregnant whether having a child would change him, alter his focus or singular determination to win/score in a relentless way. It's an oddity in sport, IMO. Jordan is a good example because he was a ferocious competitor and never seemed to coast although I think it's safe to assume Leo won't be trying any other sports.
He's an emotionally introverted player from what I've gathered over the years so I thought if he experienced something traumatic, even personally, it could dislodge him from his current path. However, he does seem to be growing more comfortable in the limelight and in front of a microphone. It helps too, I suppose, having teammates like Iniesta & Xavi who are pretty even keeled themselves and was around to witness the implosion of a player like Ronaldinho or petulance of Samu.
Hard to say but if anything, I have noticed his approach in games is definitely changing - he paces himself throughout a match and picks his moments to go into 'Leo mode'. Some have described it as laziness or even ego but I think he's listening to coaches who are telling him to save his energy & legs. Particularly when you consider how many minutes he plays a season, I mean is there anyone who plays more than him? That has to take a toll eventually.
Personally, I hope he takes it easier and even subs out late in matches or even rotate and miss less consequential ones but I don't see it happening. Perhaps, in the end, he'll simply fly back to whatever planet he came from eh?