Sony has a solid track record when it comes to quickly making open source kernel files available to the public. The company released them for the T-Mobile exclusive Xperia Z1s last week on the same day that the handset launched in stores. Now Sony is following through with the Xperia Z1 Compact just after launching the phone in Europe.
These files are what developers need to make the custom ROMs many of us can't get enough of. Of course, people don't need to wait for such a release to start hacking away at a device. Developers have already rooted the Xperia Z1 Compact and gotten ClockworkMod Recovery running on it. But that's just the beginning of the process, and taking things further is where these files come in.