Paper doesn’t require booting time, passwords, or fingerprint scanning. Pens and pencils don’t require charging. Field Notes don’t crash. Bic pens are ready to write at a moment’s notice, whether you have 4G connectivity or not. Cheap spiral notebooks don’t need a lightning cable or a power brick.
With paper, there’s no system to learn; no hot keys to memorize. Formatting is decided by the user and can be changed in an instant.