None of them are 100% work from home. Work from home pays work-from-home market rates, not high end silicon valley rates. There will be some, but they will have

None of them are 100% work from home. Work from home pays work-from-home market rates, not high end silicon valley rates. There will be some, but they will have negotiated a switch from office work to remote work after a few years, or have hard to source specialist skills.