It really bothers me how people here interpret spandrel as a building feature that is placed in lieu of vision glass to save money. Spandrel serves a very necessary purpose. The most expensive, grand office and residential towers around the world pretty much ALL make use of spandrel in one way or another. It's designed into the building and not randomly added later on as a cost-saving measure while construction is about to start.
If you are going to judge materials on how they look, that's fair. I love a good discussion on aesthetics. But don't blame spandrel itself. Spandrel is a very necessary feature of any large building project (especially in a climate like our own). It's about HOW it is used, and how the design makes use of spandrel. Is it nicely integrated? Is it used to try and appear like vision glass (as many condos attempt to do and fail)? Would another material have been good in its place?
But seriously, we need to stop making it just about "glass OR spandrel" and "cheap VS. expensive". There are many nuances to the discussion of spandrel, which is not a bad or good thing on a building, but rather a necessary building component.
/end rant.