Convinced you'd be able to sustain the project that way, would you consider opening up the project's source? My motivation for wanting this ties a bit into:
> I will not disappear. Moving forward, LearnObit will only improve with new features and polished programming. I promise.
Your promise isn't worth much. You will most certainly disappear at some point (when you die, which might be today [this is not a threat]) and will likely lose interest far, far sooner.
If I made a comprehensive knowledge base I'd want everyone to be able to access it, not just people with a subscription to a SaaS product, which will quite certainly become disfunct within 100 years.
I'd also want to be able to extend it with my own scripts and features. All these problems could be solved relatively easily (but perhaps not as profit-deliveringly as you wish).
Okay, that's the free software preaching.
Conceptually I like the idea of this app, an important part of my bullet point list consists of knowledge base stuff. Other key components are thoughts that need to be noted somehow and planning of things (which might be a great addition to your product, as you are already creating to do-items in a way). Keeping all of these things in one app would be something between good and essential for me, as I think I would like some portability between the use cases.
I haven't even looked at LearnOrbit yet in detail, but the thought of a newcomer in the outliner-niche and your novel concept definitely excite me.