Sony has been an active participant in the Android open source project AOSP, and "Open Devices" is an open-source project Sony has developed to make it easy for developers to research. Above, Sony almost opened up all of its Android models of the kernel code. After the open source, as long as there are developers willing to maintain, these phones ROM can be updated almost always.
When two new machines are added, it's time to build their own custom Android O version for them:
However, Sony also stressed that the code may be some initial instability, welcomed the developers to participate in the project, provide feedback.