Have fun at your nice job, but I'm not coming home to roommates for $3k a month. The numbers don't really seem to work out, a lot of people are basically selling great living conditions for the chance to go work at companies that probably won't be there in a few years and really aren't doing anything interesting.
Also the "monoculture" dig applies to tech specifically: in terms of actual cultural diversity very few places are as interesting.
I feel like people who say this about any city haven't gotten out much in other cities.