Probably in reference to Ext4's[0] configurable rename-replace behavior under auto_da_alloc

[0]: https://www.kernel.org/doc/Documentation/filesystems/ext4.tx...

Edit: note this isn't a universal property either, so it's still wrong: https://btrfs.wiki.kernel.org/index.php/FAQ#What_are_the_cra...

Yeah considering that the test is on btrfs, I would really be interested in knowing what OP is referring to.

Also, even if we were on ext4, it's worth pointing out that the ext4 documentation refers to apps that rely on that behavior as "broken applications", so it's hardly a good term of comparison.