I've been in the Dev world for about 4 years now. When I started I was also undertaking a reorganization of my life as well. Tracking all this was initially done digitally, but I found myself too often forgetting to update those digital mediums because of screen burn out. I actually use a system exactly like yours, though I have 3 notebooks: Engineering work notebook, A page a day dated listing my todos for the day and any insights when solving them; Daily/Weekly planner to track appointments and keep myself on task with personal goals; and a personal journal to record thoughts and feelings on everything from daily life to large philosophy questions.

The one thing I wish it did have a search function lol.

EDIT: A big reason I pushed away from digital and on to physical was distractions. Paper notebooks dont have the majority of human knowledge and world events just a click away.