ext3 with the default data=ordered was the filesystem that taught a generation of Linux developers that fsync(2) does nothing to improve data consistency and ha

ext3 with the default data=ordered was the filesystem that taught a generation of Linux developers that fsync(2) does nothing to improve data consistency and has crippling performance impact, so should never ever be called. The inevitable results of applications developed for ext3 running on other file systems incurring data loss on system crashes then got blamed on those other filesystems (including ext4, ironically).