Meh, I've been "abandoned" for updates on my Moto Droid Turbo as well. I have to tolerate the horror that is Marshmallow, despite the fact that Oreo is now the king of the hill.

And you know what? I just don't care. The security updates have been pushed in a timely manner, even for Marshmallow if they were required at the system level. Application updates (including to System WebView and security critical services) continue to deliver new functionality.

But yeah, if you want a great camera and consistent full system updates, you should probably skip these.