In Silicon Valley, in a neighborhood of $2.5M homes, and thus household incomes on average of probably $600k+. It should be possible to get a fiber rollout, they aren't that expensive. Make a neighborhood ISP, or try and get a municipal ISP.
I seem to recall a few different "if we get this many signed up" flyers (more East Bay than South) trying to organize something along those lines - maybe the name was Compass? Also try Sonic and see if they have anything for you.
I've had ATT gigabit fiber for ~6(?) years now. And for the first time ever (started with a 300 baud modem in 1985), similar to recent CPU releases, don't feel a compelling need to upgrade. In fact, would consider 0.5 Gbps if it offered substantial savings, since we don't fully use 1 GB. But no caps, and getting measured throughput of 850+ MB/s for $85 (started at $70) is affordable (for SV) and has been very reliable other than when the very-early transceiver they installed (I was one of the first to get it) got waterlogged and shorted out - the replacement was installed indoors, so that won't happen again.
I'm not a fan of ATT's corporate policies by any means. But the alternatives are, well.. Comcast with a much worse service (not symmetrical) or some flavor of 5G.
People want their nice neighborhood of 2.5 m homes where 100% of utilities are underground and aesthetically pleasing. While people in ordinary neighborhoods in Japan with 100% aerial fiber on utility poles have far superior fiber based last mile ISP service.
