I think they did. There is nodelalloc for those who expect frequent crashes or do not want delayed allocation for some other reason. There is that hack to make 0-length files rare. And updating files using the common rename idiom does not force a painfully slow journal commit like it did in ext3 with data=ordered.
Meanwhile there is more awareness among application developers about the need to use fsync or fdatasync for data updates that need to persist and not to use those functions for updates that are not so crucial. So apps are finally doing the right thing on ubifs and hfs+.
So at least this ext4 user wouldn't have it any other way.
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