Getting back to this, yes, it is designated as a 2015 design, but I bought it in December 2016, so no doubt it had some hardware updates along the way.
It is an advanced Smart TV running Android TV version 8.0.0 with Kernel version 3.10.79 from March 4th 2020. Very recent.
I was hoping JRiver for Android TV would run on such a platform. Really, after the Shield and maybe a few lower-end Android TV devices, it should run on Android based Smart TVs, such as the Sony, best. Those are the primary platforms for Android TV. I would also have expected it to run on Android TV version 7 and above, as many cheaper Android TV devices I looked at run version 7.
Also, MO 4Media runs on my Sony TV pretty well. It doesn't play all video formats, as I understand it uses the Android playback engine/components, rather than ExoPlayer, but it works for Video, Audio, and Images.