"In the 1970s and 1980s, a generous spirit suffused the internet, whose users were few and far between. But today, the net is ubiquitous, connecting billions of people, machines and essential pieces of infrastructure -- leaving us vulnerable to cyber-attack or meltdown. Internet pioneer Danny Hillis argues that the Internet wasn't designed for this kind of scale, and sounds a clarion call for us to develop a Plan B: a parallel system to fall back on should -- or when -- the Internet crashes."
Microsoft Azure has private network that connects its data centers all over the world.
Very likely AWS and Google have the same.
If big cloud service providers have direct connections,
and the users find a way to connect to one of their access point, that could be "plan B".
How to connect? Maybe Low Earth Orbit satellites...