Toronto has a frightening number of hotdog stands, and while I used to enjoy one now and again back in my meat-eating days (1991-this past june), nothing put me off the idea of eating a hot dog more than the smell of one of those carts.
Now, in those times when I am hungry and only have $2 on my person, it is all about the hot dog cart veggie dogs for me. There's very little noticeable difference, texture- or taste-wise, and they smell a little less gross.