No biggie. I lose my Google WiFi here in Mountain View a couple of times a day for a few minutes, sometimes more--it's my enforced break time. I take the dog for a walk or go have a bubble tea at Verde. When I get back, WiFi is back, and I'm refreshed and thinking more clearly. Of course, on the occasions when it's gone down for more than a few hours, I get twitchy and nothing gets done. So, I guess a long-term power outage would be dramatic.
Seriously. There's nothing more un-SF than living in a high-rise apartment building with asshole landlords. It's much better to live in a 3-flat building with a near psychotic landlord for the real SF experience.