Recently, I traveled to Denver, CO, and though I didn't go for beer-specific purposes, I took advantage of a few breweries (and taphouses) that were conveniently close to my hotel.
The one I was most excited about was Great Divide, mostly because I had discovered their Saint Bridget's Porter years beforehand. I did not keep track of this beer, however, and was disappointed to find that they no longer produced it.
The bartender informed me that this was because "porters don't do well in the marketplace."
Is this a common opinion among brewers? Could it just be regional to Denver? What might the reasoning be behind this?