Experiment: Kanji density vs. speed in rapid note-taking

I recently ran a test comparing all-kana writing against balanced kanji usage during fast lectures. My data shows that while kana is faster to write initially, it creates a "visual blur" during review, increasing reading time by 30%. By focusing on high-frequency characters and leaving more complex ones as phonetic symbols, I found an optimal balance for both speed and legibility. What's your specific threshold for s