I've been thinking over opinions I have read in various threads (DRL, transit city, new streetcars) - almost everyone seems to agree that subways are always the best option, but because they are expensive sometimes we need to look at alternatives. I have always loved Toronto's streetcars, without having any particular reason for feeling this way, and while acknowledging that in too many cases it is faster to walk than take the streetcar.
A few things have cemented this for me, one is the realization that building a DRL could mean the end of one of the downtown streetcar lines. The other is
these renderings of the east end of the Eglinton LRT where it runs on the surface. Of course here we are not technically talking about streetcars, but what a transformation if the east of Eglinton could look like that.
I found this article which discusses streetcar expansion in the US and explains some benefits of streetcars:
http://www.streets.mn/2013/03/12/six-less-obvious-benefits-to-streetcars/
One that is almost taboo to discuss is traffic calming - arguably one of the reasons that Toronto streets with streetcars are so popular for shoppers and cyclists is that the car traffic is slower and improves the ambience. It is not only good for local residents - streets like King and Queen, burdened with streetcars as they are, and almost impossible to move on with automobiles, practically define our city. They are where Torontonians go for dinner and to meet friends. Not the downtown freeways like Richmond, Adelaide and Jarvis.
Another advantage of streetcars that is more intangible - streetcars work best when the entire street is built around them. Which is completely appropriate when you look at the number of people these vehicles carry compared to the automobiles sharing the same amount of space. The result can be quite appealing aesthetically (see the Eglington rendering). I think St. Clair is a much more attractive street than it was before, with the right of way.
Subways, despite being incredibly expensive, tend to support the notion that surface streets are for private automobiles and have practically zero impact on the streetscape. They are great for moving people around but not so great for creating a neighborhood.