Why is Sushi everywhere?

On my recent trip on foot around the great city of Montreal I noticed something.

Sushi restaurants are absolutely everywhere in this city. From small local bars to huge chain restaurants, Sushi dominates as the mass food. Their are easily more sushi restaurants than there are McDonald's which surprises me greatly.

Don't get me wrong... I love Sushi but when did it become fast food? Isn't fast and probably in some cases careless against the whole philosophy of this fine dish.

If you are going to eat vegetable based Sushi then I think it is probably best just to make it at home. It's very easy. The prime fish sushi..... I think I will leave that to the best.