I grew up in the 70s and 80s. I went to Ottawa once or twice when I was a teen, but only made it to Montreal for the first time about 15 years ago.

I agree with you about the Maritimes. The bridge has made a difference but it's still a long drive and as you noted there are few famous destination cities or attractions.

Regarding Quebec: It seems that far more Quebeckers are aware of New England attractions in Boston and points north than the other way around. You see them or hear them at ski slopes, beaches, concerts in Boston, etc. Yet few New Englanders have been to Montreal, and even fewer have even heard of Quebec City, the walled European city and heritage site just a few hours downriver.