@craigski what does 4k UHD TV consume? 50 Mbps, so what 5.6% of an assumed ~900 Mbps downstream TCP+IPvwhat (v4/v6 unspecified) payload connection. So pretty much nothing. I would assume that an o/s update release could be a worse nightmare but only if the downloads were somehow all happening at exactly the same time, which is unlikely. So live tv being synchronised might be a worst case scenario but 5.6% is still not much.
I once did an admittedly very poor test; while the men’s Wimbledon final was in progress, I did various different speed tests while using my AA DSL connection. Of course absolutely zero performance droop was observed compared to normal, and zero packet loss or signs of congestion. My internet connection at 9-11 Mbps is so slow that it isn’t challenging AA, but I was looking at the effects of other AA users, all of whom would have had much faster connections. AA used to publish core network packet loss and congestion figures. I don’t know if they still do, but I can’t remember where it might live on their website which has since been thoroughly redesigned.