Luhmann's Zettelkasten is an analog system because personal computers were not available at the time. However, nowadays there are still many people prefer an analog system or a mostly analog system 0f1 for various reasons such as reducing screen time.
keywords: #analog-zettelkasten
Digital for reference? Yes, please.
Digital for note-making? I just don’t enjoy spending my off-the-clock time staring into a screen. I realized I was violating my own law! (Havron’s First Law of Personal Information Management: Use tools you love to use.)
"Use tools you love to use" is the exact reason I use an analog camera for my photography hobby.