Sony clarifies Concept for Android releases, says no other phones will get it
That's because Sony was a bit inaccurate in its official statement and said that “the next step will be to launch a community similar to the InTouch community for our upcoming Xperia XZ Premium.”
The most important tidbit that we've found in the Q&A is the fact that Sony has no plans to release Concept for Android updates for another device. Also, the handset maker confirmed that there would be one more release scheduled for Experimental track next week.
After that the last Concept for Android update is pushed to the Xperia X devices, users are recommended to go back to official software to keep their phones updated.
Bear in mind that your Xperia X won't automatically go back to official software, so you must use a Windows or Mac computer and perform a software repair via Xperia Companion. Alternatively, you can use FlashTool, if you're on Linux.
source: Sony Mobile via XperiaBlog
Things that are NOT allowed: