Btrfs Is Not Yet the Performance King
Ashmash writes "Benchmarks of the Btrfs filesystem have been published by Phoronix that compare it to the XFS, EXT3, and EXT4 file-systems. In the end they conclude that this next-generation Linux filesystem is not yet the performance king. In a great number of the tests, the EXT4 filesystem that was designed to be an interim step to Btrfs actually performs much better than the unstable Btrfs, albeit Btrfs still has more advanced features. Fedora 11 even took longer to boot when using Btrfs than EXT3 or EXT4."
And what happens? Someone takes the features they need from a non-GPL program/filesystem/etc and creates a GPL version. Yea, great going there with using an incompatible license. Feel free to use a license incompatible with the GPL. Also feel free to whine when someone replaces the functionality of whatever you've written with a GPL version, which is then included in Linux distros or the kernel where huge amounts of users get access to it.