I don’t have much evidence but feel like fsync has overshot its significance. It’s really important in databases and that’s fine, but a lot of software can hand

I don’t have much evidence but feel like fsync has overshot its significance. It’s really important in databases and that’s fine, but a lot of software can handle (very occasional) kernel / hardware crashes by e.g. restoring data from an external backup, and can benefit from the mmap guarantee that process level crashes won’t lose any data.