When I talk to my Google Home then 50% of my brain power is engaged in predicting and working out how to best phrase something so that the "AI" understands what I mean and the other 50% is used to actually think about what I want to accomplish in the first place. This is just about okay for things like switching lights on/off or requesting a nice song I want to listen to, but I could never be productive programming like this. When I'm in the zone I don't want to have to waste any mental capacity on supplementing an imperfect AI, I want to be thinking 100% about what I want to code and just let my fingers do the work.

For that reason I think this will be less appealing to developers than GitHub may think, otherwise I think it's a cool idea.

I use it and do find it useful. The decorative aspects of the journal keep me engaged. That is, if I spend five minutes doodling or drawing lines and bullets, my mind is occupied with what's on the page. Whereas a digital todo list or calendar, it takes only a second to add a new item and then it's discarded from memory.

My advice, just give it a try. A pen and a notebook is a pretty small investment. My journal looks nothing like the ones on YouTube.