Mate, you'd be the one in 1910 saying United should've stayed at Bank Street rather than move to Old Trafford because of the memories.
I bet people moaned then about the soulless bowl that was OT.
And in reality that's what it is.
Old Trafford as redeveloped in 1994 was the prototype for all the soulless bowls developed ever since,
Or perhaps you'd be moaning back then because of the old Stretty with terraces and so on?
It's always, always been the matches played and the players and managers involved that create the memories. The ground itself just happened to paly host to it.
There's absolutely nothing to suggest that had Sir Alex presided over his term in a brand new stadium that you wouldn't be looking back with fondness for something built in 1986 (or any point from when he started winning things after that) rather than 1910. Think about it, honestly. You remember the good nights and the bad ones, but it's not like they can't happen again and again.
Ask Arsernal fans when they've been at the Emirates for as long as they'd been at Highbury and then see where it stacks up.