Perhaps I'm not as disciplined as all the other die-hard Zettelkasten practitioners, but no matter what tool/software I adopted, I almost always end up abandoning them.

The missing ingredient (for me) was a feedback loop: metrics. With the system that I designed for myself (through trial and error) , I no longer rely on one particular software ... metrics I put in place now remind me when I need to:

1) Convert my literature notes into permanent notes (i.e. create notes in my "slipbox") 2) Explore a subject in more depth