Jotting down my harvest weights after dried and cured is all I write down pretty much anymore. The weight of each plant's dry weight, and the total sum of all plants from the harvest. No dates, strain info or anything, just the weight. All in a Moleskin that I use for writing random poetry or lyrics in, on a random page. I use quite a few Moleskins per year, so I have random numbers written throughout them that can't be used to indicate anything.
Like yourself, I used to document absolutely everything when I first started indoors, and continued that practice for over a year. Now I can just tell by listening to the plants.