The whole idea of logging, to my mind, is becoming familiar with the numbers so that you can respond appropriately with inevitable adjustments to insulin treatment. A manual logging system works because its very nature requires that you observe data, write it down, and hopefully look at it several times more. I view learning as repetitive brain traces using multiple sensory systems (sight and touch, like writing, primarily). Students who take notes and rewrite those notes often do much better at learning the topic than those who just try to wing it.
That being said, I am lazy about old fashioned writing. I use the Dexcom Clarity web-based reports (sorry - for CGM) for my several times per day every day way of staying in touch with my data. This is just a visual mode of learning but the spaced repetition works for me. My favorite report that provides actionable data is the Clarity 14-day Standard Day report.
There is software for uploading and integrating meter and pump data for reports and analysis. I like Diasend for this. You'll need to register but it's free.
Very few people with diabetes actually do this (maybe 10-20% at most) but the TuD community probably are over-represented in the "data nerd" category. I have found a powerful connection in me between watching the numbers and subconsciously trying to influence those numbers and push them in a better direction.