So, I moved to SF in 1994 in my early 20's, which means my bona fides are longer than the OP, but still not native. However, from the greater baseline I can say a few things that won't be easily available to someone having lived in SF for a year: 1) public transit has sucked since well before the tech boom. When I moved to SF Oracle was probably the northernmost tech company of note (not counting Autodesk in San Rafa…
Furthermore, the majority of the people I knew weren't particularly interested in living in the city. Some of that was because it would have required a longer commute. But, in general, there wasn't even a particular preference among recent grads for living in town. Some did, but it wasn't the norm or even especially common in my experience. This is partly because, by and large, US cities were not as pleasant places at that time and this in turn led to less investment in transit, etc.