We get reminded of how much we depend on the internet when we lose connectivity because something failed upstream 😅
I think what would affect us the most would be our jobs, as we're full remote. Then, it would be the fact that we can't talk to most of our friends and acquaintances online anymore.
Otherwise, for me, I would be bothered by not being able to read docs online, and the fact that most software requires an internet connection to function (even though they don't need it). (and then entertainment, in general)
The other problems are paperwork, really. Almost everything needs to be done online nowadays... (which is bothersome in many ways, as they have the least secure, most broken services)
But I think overall I'd be mostly annoyed and I'd probably use other networks.