Many years ago UK ISPs particpated in an MBone with BBC, ITV etc providing live broadcast https://www.bbc.co.uk/multicast/tv/channels.shtml https://www.bbc.co.

Many years ago UK ISPs particpated in an MBone with BBC, ITV etc providing live broadcast https://www.bbc.co.uk/multicast/tv/channels.shtml https://www.bbc.co.uk/multicast/tv/channels.shtml Brandon Butterworths note about "why" https://support.bbc.co.uk/multicast/why.html https://support.bbc.co.uk/multicast/why.html Shows the growth of the backbone and CDNs: > The Olympic audience is expected to be around 50K streams, delivering 10Gbit+ is on the limit of sensible unicast delivery. In 2020 the BBC's internal CDN was delivering 100 times that [0] for 250k users, and 5 years later I suspect it's another order of magnitude given that iplayer does 5 million concurrent live views quite frequently [1,2] [0] https://medium.com/bbc-product-technology/bbc-online-2020-in-review-e47dada5df3f https://medium.com/bbc-product-technology/bbc-online-2020-in... [1] https://www.bbc.co.uk/mediacentre/2024/audiences-flock-to-bbc-for-major-sport-finals-euros-wimbledon https://www.bbc.co.uk/mediacentre/2024/audiences-flock-to-bb... [2] https://www.bbc.co.uk/mediacentre/2022/england-v-iran-bbc-live-streaming-record?utm_source=chatgpt.com https://www.bbc.co.uk/mediacentre/2022/england-v-iran-bbc-li... By 2035 and TV turnoff there's no reason to believe that the infrastructure won't have been able to scale another 100 fold and handle 500 million concurrent live streams. Makes no sense to multicast out 30 different formats, to people on phones and tablets and TVs hanging off wifi. It's a very different consumer experience than a PC wired into an ISP like it was in 2007.