This is kind of like an argument-by-consequences since SF funding for transit and roads has viability problems due to SF's comparatively low residential density, as the funding from Covid, federal and then CA state emergency funding that replaced those disappear in 2025. This will cause big service reductions in SF MUNI [0], BART and Caltrain, starting this year.
And it wasn't about "the will of the Outer Sunset" [1], and some (local) people there rely on car or rideshare access, plus all the rest of us from everywhere that isn't the Outer Sunset also want to be able to drive there to visit. The existing post-Covid time-shared road/park setup on Highway 1 was already incredibly friendly to bikes, pedestrian, pets, children, surfers.
And SF Measure K only passed 54.7:45.3% [2].
> "increasing maintenance costs due to erosion are another huge reason it’s a good idea)"
You could argue the exact same that SF cablecars could be cut because they net lose money (federal subsidy), or about all of us constantly paying for the upkeep of Highway 1 down at Big Sur, which is regularly closed/subsided/storm-damaged, and costs $$$ to repair every winter, but the wishes of the (small population of) locals have to be balanced against the wishes of everyone else (CA + out-of-state residents, tourists) who use it.
In any case re the viability of transit at such low neighborhood densities, Seamless Bay Area [3] have for years been pointing out the ongoing insanity, duplication, waste, lack of ticket interoperability etc. of bankrolling 27 different agencies for 9 counties in a metro area of only [0]: https://www.kqed.org/news/12014573/sf-muni-dire-need-funding...
[1]: "Do voters want to close S.F.’s Great Highway? New Chronicle poll shows where they stand [Prop K - 46% in favor of closure, 44% against, 10% undecided]" 10/2024 https://www.reddit.com/r/sanfrancisco/comments/1gaaj36/do_vo...
[2]: 2024 SF Measure K https://sfelections.org/results/20241105w/index.html
[3]: seamlessbayarea.org
[4]: "One journey, one ticket", key learnings from Swiss public transport" https://news.ycombinator.com/item?id=38686115