Thought I would give you all an update. Accountability and all.
Try as I might, DW is simply not on board with downgrading our car at the moment. I have already had major success in the car arena by convincing her we can be a one car household, but pushing it further would clearly lead to trouble in paradise. She has been fully on board with cutting back on eating out, slowly using less AC, taking shorter showers, getting books from the library (major win, we already have 4 bookshelves) reducing our driving, and I swear I saw her turn a light off the other day. However when it comes to the car I truly believe pushing it further at this point would be penny wise and pound foolish.
Still at 62% savings rate and on track to retire by 40 assuming we make no more optimizations :)