I had friends who were artists and graphic designers that lived in a 2-floor 4 bedroom apartment in Noe Valley with incredible views of the Bay. They were paying $3200/month combined, so $800/month each.
That time was probably one of the best in my life. There was always something to do in SF, we would go out every weekend, go to bars, clubs. Golden Gate park for sports, free outdoor concerts like Hardly Strictly Bluegrass, I saw Robin Williams perform comedy one year for free and most importantly it wasn't crowded. People didn't think that their social media life depended on them going to an event or a restaurant and posting about it.
It started getting worse because of the 7x7 list and lines grew longer because people wanted to follow that list like sheep. Then more and more tech workers drove up the prices until all my friends that I used to hang out with moved out of SF to other parts of the country. DC, LA, Denver. All their apartments got replaced by tech workers. SF is now a mono-culture and pretty destroyed if you ask me. Everything is overcrowded, unaffordable and overhyped. It's a real disappointment to see one of the most beautiful cities in the world rot from the inside.