&gt; what made it faster than ext3 created a lot of corner cases that make it far less reliable<p>That is an odd claim, considering that the ext3 implementation has been removed from the kernel this year, and various distributions have for several years already used the ext4 driver to mount ext3 filesystems.<p><a href="https:&#x2F;&#x2F;lkml.org&#x2F;lkml&#x2F;2015&#x2F;8&#x2F;31&#x2F;22" rel="nofollow">https:&#x2F;&#x2F;lkml.org&#x2F;lkml&#x2F;2015&#x2F;8&#x2F;31&#x2F;22</a>