[Jon]

If you look at the speech in its totality it's more about setting the stall for future policy and funding debate, possibly with an eye on a new government more favourable to the BBC.

In reality, I suspect that the BBC would be one of the last to switch off linear broadcast TV & radio.    There has been huge progress since the days of streaming a postage stamp size picture over dial-up with RealPlayer but it is yet to have the resilience and reach of broadcast, something Tim Davie acknowledges.  And let's not forget the BBC closed BBC3 as a linear broadcast channel, weakening itself in the process, only to bring it back.

My mother, who on receipt of a contactless debit card sent it back to her bank, still uses BBC Text - the BBC tried to close this down but had to withdraw due to opposition.

For some it is not simply a case of education, those with dementia for example may really struggle to adapt to a new system.

BBC one would surely be a strong contender to be the last traditionally broadcast linear channel left in the UK. 
Also another issue is internet failures are quite common. Most people with Sky or Cable have aerials as well so unless a power cut happens if one goes down they can still watch via the other. The Internet has gone down for me living in London a lot more than the power has in recent years. So being internet only cuts people of TV if it goes down unless they have very generous Data packages.

The internet going down occasionally wouldn’t be a major issue. But it’s actually a good point in respect to major emergencies and perhaps you’d have to have some back up for certain situations perhaps only allowing access to news websites and audio programmes. 

I think the point remains though, yes they’ll be examples of potential issues that didn’t arise before and broadcasters will have to work round that. But also if there is a power cut these days, most people will have some way to access the internet, when they wouldn’t have done in times gone by. 

Most of those who seem worried about this, seem to think, when this happens demographics will be exactly the same and there will be no other technological available to make it more user friendly, generally available and more resilient.

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This is utterly outrageous, the BBC should be concentrating on providing programmes and services on linear TV and Radio, not online services and expect everyone to go online when not everyone can afford it, especially the older generation, it's like saying schools and shopping move online, Tim Davie must be stopped.

Well shopping is probably mainly done online and whilst they’ll probably always be a need for certain physical shops, it’s only going to decrease in this time frame.