I've said the same previously.One of those things that is impossible to predict, because at 18 you fear nobody, but by the time you are 21 you are too scared to make a mistake or lose possession. One thing about the lad is that he runs at everyone, regardless of if you are Barcelona or Burnley. And defenders hate that in every league around the world. I really don't know why that is drilled out of players, thinking about Foden at 19 and 22. Very different players.
I bet every team in the Premier League has currently got some 17 or 18 year old on their books who's fast and tricky and full of the confidence and spunk of youth who if he was allowed to go out and just play as he pleases with no responsibility to adhere to tactics or contribute to the team as a whole would look just as good as Garnacho and the endless line of other united 'wonderkids' who go on to fade into obscurity once the hype has died down.