Comment by cxr

At only ~12 hours of recording per device, this wouldn't replace other forms of notetaking where you can afford the necessary interaction cost (e.g. taking out your phone). It reduces the number of times that you're unable to take notes (due to ergonomics/physical factors or otherwise).

It increases the surface area of your day where "I am able to take a note right now (because I don't have anything stopping me)" is a true statement.