If you want to make commuting more efficient, wouldn't it make more sense to have the maglev run from the east bay (or somewhere much more affordable) than SF? I haven't read great things about real estate affordability in that market. How would such a maglev will help affordability in SV?
I think more likely alternatives are:
* build up if a high density coalition can be assembled (unlikely, but possible)
Or
* people stop moving to the bay area or leave when they are ready to settle down. Remote work becoming more acceptable may be part of this.
We face some of the same issues where I am (Boulder), but of course nothing near the intensity. We have huge chunks of uninhabited plains to our east that are being built out. If we have the water for it, and can handle the in commute traffic, we are good to go. (I realize those are big ifs!)