Anybody who writes off a young player cannot have their opinion taken seriously.
Players do not improve in a steady fluid motion but in fits and starts. They can appear to be brilliant, then stall, then have a great spell and then stink the place out for a while before finding form again,
Age and experience brings consistency more than anything else.
We have seen that with most players who show real promise the club tends not to let them leave until they are probably 22 or 23.
The team into which the player is introduced is also a factor. Phil Foden is a wonderful talent but it is a lot easier to show your talent playing in a City team than playing for a team struggling against relegation.... Ben Godfrey may be an example of that.