Or should i say they will be outdated and non productive if they are not on the internet. Any business that refuses to adapt to the new Tech will late incur the roght of setback. As the world is evolving with new tech, we should also be able to embrace it or choose to follow a lonely or outdated pattern. I could see so many businesses people who has remain stagnant over some decades now and it's as a result of the inability to embrace new tech. But however there may still be people who does better even without the internet facility, but they are likely to be few.
Some time ago in my country, many people complained because their sales decreased drastically due to the existence of e-commerce or online shops. Well, this is an example of where when we do not follow the development of the times, then we will also be dominated by the times.
Like it or not, we must continue to adapt to any situation and we must always be in a condition that is always ready for the changes of the times.