Most work related knowledge should go on work place infrastructure online document store, at the same time its a total waste of time to re invent a clone of stack overflow. Any general knowledge information I'd want to look up, is already available on the internet. Work information, tribal knowledge- should never go on a personal Google Drive.
At the same time my notebook information is a mix of personal things, work things and lots of other notes, scribblings, and free form information(mind maps, doodling, random writing), I need this just because creating a meta-data knowledge graph, list in the brain is just too much work, stressful and its like a offline store for your brain's functions.
Software tools don't work well for this kind of information input and putting it in either GDrive would not be good. Hence the notebook and pen.
Another big thing I've noticed is the personal productivity system is a catalyst that helps you do work, its not your main work itself. There is little incentive in storing what time you went to gym ten years back. Information/Feature pollution is a bug not a feature.
Unfortunately, Org-mode in emacs, like anything in emacs is a full time project in itself, a huge time sink that has little return on time investment. Use a tool to make your life better. Don't spend time wandering in sub goals trying to make the tool, that makes your life better. The former gives results, the latter is just a long play time sink, where you will forever make the tool better, you will never arrive at making your life better.