Off topic, but as an obsessive debugger and experimenter with ADHD and someone who hates telling people lies about what can and can't be done your motivation speaks to my soul. But my usual rabbit holes last just few hours up to few days. And even those that go far (that avoided all obstacles) end up right before implementing the last step, when it becomes obvious to me that this thing can be done. Congrats on the sheer stamina.

I might use lesson you provided in my future to actually achieve something. I just need to doubt the feasibility of even the last step.