After a few days of more serious use, I've come to the conclusion that the console is a bug-ridden, crash-happy piece of shit.
Extended drives are a mess, especially with large libraries. They basically work 50% of the time, the rest of the time your whole library (including local stuff) is unavailable whilst it sorts its shit out. And it insists on downloading EVERYTHING even though the drive is full, so I have a constant loop error. I can't see away to turn this 'feature' off.
Display options are gimped and there are handshake issues with the supplied cable and all my devices (I tested a generic Samsung 50 from last year, a Q90R and a Faux K projector), using both the supplied and my own cables.
Crashes constantly, in any status, in any game (apart from Astro) (It even crashed whilst doing literally nothing on the dashboard, just gave me a feck you and blacked out).
It's a mess.