I’m not super familiar with fiber. There’s no modem or anything needed? Don’t they still track data usage? Are they able to do that without any intermediate equipment?

Care to explain what you mean? Are you saying you can run fiber in your house? Doesn’t that still require some form of equipment from an ISP to actually go out to the internet?

What’s wrong with that book?

I get that response due to the way this quote may have been used on the internet, but to be fair, in the show she was absolutely implicitly asking him to fix it. She says this after seeing that Eric gave Donna his coat when she said she was cold, and was essentially testing him.