I should clarify that in the case of First & Tenth, the teardown hasn't happened yet. But the office building I mentioned earlier that was torn down at 17th and 4th, leaving us a gravel lot, was maybe 40 or so years old and could have been repurposed. A number of character buildings torn down for The Broward.
Perhaps these parking lots make bank, and so there's less of an economic case to redevelop them, but I have seen a lot of buildings torn down in the past few years leaving just vacant lots. In my view even an empty building waiting to be reused is still better than a gravel lot. So much is going right in Calgary right now - we're rapidly heading towards 2 million people in the metro, the economy is growing and diversifying, we're becoming a top destination for immigrants, etc etc yet it seems like in many respects downtown is going in the wrong direction.