Sadly it's not quite so easy to increase road capacity as unlike a real city where you can add residents without adding vehicles, it's simply not possible to add residents in the 'burbs without adding an equal number of cars on the road. I'd love for it to be otherwise, but the sprawl can't be fixed just by rezoning lots for higher density.

I think it's more an issue of poor planning than fear of change (although yes, some residents want the city to be a 1966-themed amusement park). Hanlon's Razor and all. Personally I have no attachment to the sentimental issues around Sunnyvale but my proposed solution of levelling half the city and rebuilding it like central Toronto seems like a non-starter.