San Francisco's housing market has never been simple, but right now it's practically two different cities wearing the same fog-drenched trench coat.

At the top end, luxury real estate is hitting new highs. The question everyone's asking: is this an AI-fueled bubble, or simply a market waking up after a roughly five-year price hibernation? The answer is probably a bit of both. Tech wealth — particularly the fresh wave of AI money flooding into the city — is real, and it's chasing a finite supply of premium properties. But let's not pretend we haven't seen this movie before. San Francisco has a long history of boom-era exuberance followed by painful corrections. The dot-com bust, the 2008 crash, the remote-work exodus — each time, people swore the fundamentals were different.

Maybe they are this time. Maybe they aren't. What we can say is that the current surge looks less like irrational speculation and more like concentrated wealth finding its way into trophy assets. Whether that's sustainable depends entirely on whether the AI gold rush produces lasting economic value or just really expensive chatbots.

Meanwhile, at the neighborhood level, the divergence is stark. SoMa sales are sliding while Mission Bay's are climbing. That contrast tells you everything about where the city's economic gravity is shifting. Mission Bay — home to UCSF's campus, biotech firms, and newer mixed-use developments — is attracting buyers who see long-term infrastructure and livability. SoMa, still haunted by office vacancies and street-level quality-of-life concerns, is struggling to convince buyers that the neighborhood's fundamentals justify the price tags.

This is the kind of market where fiscal discipline matters most. Buyers chasing FOMO at the luxury tier should remember that real estate isn't a tech stock — illiquidity is brutal when the music stops. And city officials watching Mission Bay thrive should take notes: people will invest in neighborhoods where the basics — safety, cleanliness, functioning transit — actually work.

The market isn't broken. It's just brutally honest about which parts of San Francisco are delivering value and which ones are coasting on reputation.