My guess would be housing or building regulations. That said, developers are starting to build, what else, high-end luxury condos in the Tenderloin or close to

My guess would be housing or building regulations. That said, developers are starting to build, what else, high-end luxury condos in the Tenderloin or close to it. I've heard the word "Trenderloin" bandied about unironically. So there's that.