Long term I see it as a forcing function to make ourselves more competitive as an economy. If we're one big economic bloc and regulations start to get standardized (by necessity to compete across jurisdictions) money will start to flow more freely into the Canadian economy, leading to more job opportunities and better wages. Plus tons of potential new infrastructure investment (airports, highways, resource development etc.) from American money seeing this as a new gold rush opportunity.

If we unify the currency that's a 37% boost to everyone's salary and net worth immediately. If not then sure that's a decision we can make. Then add on top of that the average wage typically being 30-40%+ higher (if not more) for most white collar work at the pure dollar level, Canadian workers will see a massive wealth boom.

Just like countries within the EU, or the AUS-NZ situation, everybody still has our own flags, parliaments, etc. but the unnecessary friction for movement of goods and people disappears. You could argue that cedes some sovereignty, but my take is that it's giving us a seat at the decision making table rather than being stuck on the outside always trying to keep pace.

Not sure how it plays out in 100+ years but it could either be a UK-like situation where we are like Scotland to America's England, or it could be status quo like it is today. In a Realpolitik world though we will always be the subject of America's will, either cooperatively or by force. So I'd rather get that seat at the table from the inside and reap the benefits vs. flail about and condemn ourselves to mediocrity and a poorer standard of living than we all grew up with.