Consumers won't, but interfacing businesses will. As an example, imagine an accounting business -- they still need to interface with some payroll and taxation systems.
That's just moving problem little bit down. Sure accounting companies are B2B by nature, but if businesses which they are doing accounting for, cease to exist, because they don't have consumers, accounting companies will cease to exist too.
I am working in a company which is B2B as well. But if our customer would lose consumers, we are screwed as well.
Yes, but banks will be around to fund new B2B ventures (that keep pushing the problem down). For example, a bank will fund a real estate+business venture that is a medical office. The business will be expected to also derive partial revenue from selling training data to AI giants.
Ultimately I think people will have to fight for basic benefits from the government derived from taxing business profits. The benefits must include food, healthcare, and some cash. Instead, the dumb voters voted for a government that took away food and healthcare benefits, so it's partially the voters fault for making their situation worse.