After forcing myself to learn and adapt to some note-taking system, I too didn't find it useful for me yet. But i keep pushing myself through because I still believe that there must be some value that I could take from taking notes. Just I didn't find a system that suits me well...? One thing that i find the real benefit/value from all this learn and adapt is "writing as a way to think" (is it by feynmann?). When doing complicated work, writing really help to ease your cognitive load and help you find the gaps in your line of thought. But, I couldn't find a suitable method when dealing with general/every day note-taking. I still have that "graveyard for thought" problem when writing general notes