Just did a quick scan of all of Bergevin's trades...
The only other trade that's similar in terms of him trading a younger player for an older player was when he traded Travis Moen for Sergei Gonchar.
There's literally no other "Subban for Weber" type of trade in his history as GM of the Montreal Canadiens.
It goes far beyond trades and you know it man. Its not as much about age as it is about the type of player and style of play he and his cronies adulate.
The infatuation with no-nonsense, no flash, grind dem out, meat and potatoes, supposed "character" types like Prust, Murray, Bouillon, Shawzy, Weber, King, Ott, Martinsen...Hiring a clown coach who preached risk averse grinding above all and had no clue how to better use and develop his skilled oriented players. Hiring his best bud who seems like a carbon copy of MT coaching-wise to develop the team's future.
He made his team look like him. A talentless 7th Dman who made a career out of going for the "safer plays" in the dead puck era.