You don't need to defragment NTFS either, defragmenter runs in the background. Defragmentation is more an issue of driver and not fs itself, I suspect ext4 does

You don't need to defragment NTFS either, defragmenter runs in the background. Defragmentation is more an issue of driver and not fs itself, I suspect ext4 does some form of defragmentation itself otherwise I can imagine edge cases that could ruin its day.