[nickjj]

This is what I do too. I have 20 years of notes saved like this.

I also open sourced a zero dependency Bash script that handles this at: https://github.com/nickjj/notes

It supports adding notes in 3 different ways:

    notes hello world      appends the text to the YYYY-MM.txt dated file
    echo cool | notes      same as above except you can pipe in text
    notes                  opens the YYYY-MM.txt file in your configured $EDITOR

I use all 3 methods of input on a regular basis depending on what I want to jot down.