as far as I know. if internet is off then you cannot connect anything related to internet.
simple example: when the electricity in your house goes out, then you can't connect any activities in the internet world.
and if the internet dies in the future, there will be chaos. especially for businessmen in the internet world.
That's clear because to create a project you still need electricity and internet, so when the product from the project is ready to be made, it will still need internet in terms of marketing, because marketing manually like in the past or like when you didn't have internet would be very difficult to achieve, because the development of the era is different now, as well as for later when the internet no longer exists, things that used to be easy will be very difficult.