Martial was effectively Welbeck's replacement, as a player who would play both up front and out wide and never fully nail down a first team place. Welbeck had 3 seasons in the first team (and a few appearances as a kid before that), and now so has Martial. Here are their records in the competitions which actually matter.
Welbeck
Martial
Welbeck was known as a player with middling end product but whose other qualities kept him in a title-chasing team. What's the clearly similarly assist/goalshy Martial got by comparison; a French accent? Instagram?
Martial has achieved feck all at this football club. He's widely fancied because he's often looks exciting and is obviously ridiculously talented, but he's a nothing player, emblematic of a nothing era for the club. Danny Welbeck was never a great goalscorer, but the teams he was a significant part of used to score a lot of goals. In the years since casting aside the attackers from those sides we've been a shadow of what we once were, and it's not because Fergie was literally magic, it's (at least in large part) because our attacking players were a lot better than the ones we've replaced them with. Often less talented, admittedly, but undoubtedly much better Manchester United players.
I long ago lost the email account that my old account was registered with. I actually think I might have quit the caf originally in the middle of arguing with Lynk, but it was a long old time ago so I'm not certain it was him.