That's an interesting point, and there's no doubt that football has changed and is changing as we all learn more about the best way to play it. This has been quite evident in England, where the current England team, which is full of young players, in my estimation just understands the game better than previous teams. It's taken decades for it to sink in that our approach to the game is completely wrong, but after generations of getting it wrong over and over again now a less talented team is finally getting it right.
However...I would doubt that simply watching Messi's performances, while you can learn from them, is going to enable someone to do what he does from a technical perspective. For example, look at the best young players in the world today. So you might be looking at Mbappe as being the absolute best. Can you see him being the best passer, dribbler and goalscorer in the world? He's a brilliant player, but he's a much more conventional winger, with a more limited game than Messi. He's like a slightly better Sterling, who is another one of the best young players in the world, but is he even remotely like Messi? No.
Similarly, if you look at The Guardian top 100 players in the world:
https://www.theguardian.com/footbal...male-footballers-in-the-world-2018-nos-100-71
The top midfielders are Modric, de Bruyne, Kante, Rakitic and Pogba. I would definitely argue that Messi creates more than any of them, and is better at passing than any of them. But even if they're on roughly the same level at passing and creativity, can any of them go past players like Messi? Does any of them score goals like Messi? Modric has scored 6 in his last 86 appearances for Real Madrid, de Bruyne has scored 17 in his last 75, Kante has scored 7 in 133 games in the PL, Rakitic has scored 9 in last 99 games, and Pogba 20 in his last 76 games.
Or if you look at the top forwards...Ronaldo, Suarez, Kane, Griezmann, Aguero...do any of them have the technical ability and creativity of Messi? Absolutely not. And not only that...they don't score as many goals as him!
The nearest players to Messi, in my view, would be players like Hazard and Salah, but even then you wouldn't say either of them was anywhere near as good at passing as Messi, and nor do they score as many goals. Arguably they're not as good at dribbling as Messi either, but their skillset is somewhat comparable to him, it's just nowhere near the same level.
So based on that, and also based on my observation of football over several decades, I don't think the successor to Messi's crown is going to come along that easily. When he's gone, someone else will become the best player in the world, but I doubt on the evidence that I've seen that they will score 50 goals+ per season, be capable of unbelievable individual brilliance, and be as good at passing, and probably better, than any midfielder in the world.
I've never seen a player like that before, and I doubt I'll see one again. If football continues for several thousand years then we can't imagine what the game will be like in the year 5000, but it'll take that sort of period, in my opinion, certainly a period of centuries for someone else to come along like Messi.
Because as big as football is now, and despite the hundreds of millions and possibly billions that play the game, there isn't anyone like him now. Not even ****ing close!
I would say the same thing about Ronnie O' Sullivan BTW. Don't know if people here watch snooker, but the ability to play basically as well with your left hand as your right is almost impossible to learn. No-one else has ever been able to do it. You can sit there watching him all day, and be inspired by it, but try to go on a snooker table and actually do it.
Try gliding around a tennis court with the best players in the world, playing beautiful tennis, with effortless movement, with a one-handed backhand, when you're knocking on for 38. Won't happen again for quite some time, rest assured.
These people are just blessed with freakish genetic ability, and they will be irreplaceable.