What is this weird feeling that I’m feeling?

Appreciation, maybe? There were books before the internet, but I think it’s no contest that the internet is the best resource for information that has ever existed. Pre-internet people didn’t have FOMO because they didn’t know what was coming.

FWIW I don’t think it’s weird at all to feel that way. I grew up when the internet became accessible to everyone, and I would not want to go back to before then despite the new problems it poses.