Sony doesn't rush with updates, this is Android 7 to 8.
They have also changed their custom GUI. The 'Discover' button on the wheel which used to do not a lot now tries to do everything. Sometimes it uses the Satellite Box channel guide, sometimes the TV guide. However, there is no need to use it that I can see.
It hadn't occurred to me to try before, but my Bluetooth keyboard pairs up fine with the TV. No more awkward onscreen text entry! The Back button on the TV is actually ESC, I guessed that, and on the keyboard that is fn+SQUARE, the bottom left and top left keys, which is weird.
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