If your office is in SF, WFH 4 days a week doesn't let you live in ultra-low-cost rural Iowa but it could let you at least work in slightly-lower-cost Modesto or even Redding. Not ideal but better than a $4K/mo SF apartment. I think I'd be willing to live with a 4 hour commute once a week (or get your private pilot's license and you're about 1.5 hours away). Not convenient but do-able.
The idea of flying to work is fun, and I have seen it pop up in a lot of these WFH discussions. But even if you have your GA license, you'll need to rent or own the plane, pay directly or indirectly for hangar space and fuel, and deal with the air traffic congestion that would arise from more than just a handful of people trying this trick. In my opinion these barriers make private flying too dissimilar to driving a car to make it a feasible commute comparison.
I was looking into it for commuting from Pueblo, CO to Denver. The place I was interviewing was a short walk and bus ride from an air field, and Pueblo is about 20-40% the cost of a similar commutable home in Denver, the flight (which I have done a dozen times in MSFS) is only 55 minutes. So round trip with commuting to and from the airports/fields, doing preflight, and parking, was only 3 hours which is about the time it takes one way by car assuming normal traffic.
Totally agree. I've got my ticket and I wouldn't do it unless I actually lived on an airpark with a hangar at my house, and I'd have to get my instrument rating to be able to rely on it for commuting.