He got the taste of the first team, and proved he can take the challenge. IF, I repeat, IF Zlatan would somehow end up with you, he (Rashford) will warm the bench for sure, or end up being loaned somewhere. Just take a look at Chelsea's prospects: lots of promise, no chance to impress. You might say that United's philosophy is different, and I agree, but Mourinho's is also different. If the board pressures him to get back into the CL, youth don't stand a chance.
This text is based on minimal football knowledge and speculation, and it should be treated likewise.
I should make this my signature.
Getting the taste doesn't mean anything though. at that age you will dip in and out of the first team at a side like United. If anyone is currently under threat it's going to be Rooney.
There is a massive difference between Chelsea's youth and United's. That's not a managerial thing, they are treated like a commodity. They are never integrated into the side. With ours, even with new signings they are all a necessity.
Mourinho is no fool, United isn't Chelsea, you can't survive without trying to bring youth through. Even Moyes with all his folly knew that.