Dynamically created inodes (might be useful if you work with a very large number of files — ext4 might run out of them and refuse to create new files even if yo

Dynamically created inodes (might be useful if you work with a very large number of files — ext4 might run out of them and refuse to create new files even if you have lots of free space), more stable performance under load (standard distributions of latency and throughput are typically lower), reflinks. In return you lose BSD and Windows compatibility, if you ever need those, and performance averages are somewhat lower (used to be a lot lower but XFS has caught up very close to ext4).