But at the end of the day it's still Silicon Valley #1 by a long shot... and then everyone else duking it out for #2. I don't see a reason to believe the status quo is going to change overnight. Culture tends to shift slowly, and culture is one of the best things SV has going for it.
Culture won't pay for rent. Silicon valley is no longer affordable for actual early stage startups. Even if you can somehow figure out rent, you have to compete with the existing tech giants in the area that can easily pay $150k+ for your engineers.
It's not the large tech companies that poach employees from small startups, it's other startups. Small startups pose more of a threat to the large, established companies. Some tech giants successfully obtain people by dumping several money trucks on certain sorts of tech talent, precisely because it is so hard to keep them from starting or joining some small venture, which will provide them with autonomy, large impact, and a chance to become fabulously wealthy. The rather cartoonish notions of startup glory also appeal to many.
There's a reason that every company in tech is trying to b.s. people that they either are _really_ a startup (when they are not), or that they are _like_ a startup (yeah, right).
Good engineers are still a gigantic bargain at $150k.
In reality, those good engineers want $150k and extremely high levels of autonomy OR $500k without caring so much about autonomy (hedge funds). A startup obviously can't afford the latter of those two options. You just need to found a company where the great engineer's desire for accomplishment and autonomy will be an asset rather than a liability. Unfortunately, VCs seem pretty invested in the idea that engineers are second-class citizens, so that's not likely to happen in their world.
Silicon Valley's rent problem is atrocious, but the big companies offering $150k are actually making it better. Why? Because when the big-company or government deal is fairly good, only startups with genuinely good ideas can attract engineers.
What's going on right now is that 99% of these startups aren't true tech companies, but bullshit marketing gambits that happen to involve technology. Those are the ones designed to mine the mediocrity of commodity JavaDrones. But if you go into the startup scene not knowing the warning signs, you'll probably end up working for one of those.