I think I *do* want my text editor to fsync() stuff I just wrote to disk,
thank you very much. I don't want the OS deciding to hold on to it for 30s
or 300s or whatever before flushing it back. It's not keeping the FS
consistent across crashes I care about: it's preserving *the stuff I just
saved* across crashes!
(not relevant for me, battery-backed RAID arrays now hold absolutely
everything I care about at home and at work, bwahaha)