I'd miss you guys. I love you all, and that includes the people who don't like me. This is basically the only site I spend time on.
I would definitely miss the ability to research online. I started "researching" as a little kid in my local library. While I loved doing that, and hands-on is more necessary for deep research, touching original sources and all that. That's thrilling. But Google, etc. makes less earnest research so easy, I would really miss that. I love just having a thought and being able to immediately look it up.