There are nearly infinite vectors to exfiltrate files from your computer, the vast majority of which are currently unknown to you, and would be entirely undetected. And what's more, most of those vectors can be done from anywhere on the planet.

There is only one way to exfiltrate information from a notebook, it requires physical proximity, and it's very likely that you would notice.

Every rational threat model for almost every human on the planet (excepting perhaps major political, cultural, or economic figures) would conclude in the paper journal being the better (safer) choice.