I guess I really don't understand the context because even with this clarification it's not clear what you're asking past "what does it take to add polish to my nascent project", when the reality is by the nature of it's nascent state no one is going to be able to give you more than surface level advice (which the LLM can provide pretty effectively, and in a more tailored way than we random commenters can. Isn't that fact kind of the underlying of your own project?)

> SoundStorm/Podcast creation is one of the big draws, but I would question as to whether its one of its most-used features, considering hallucinations and shallowness.

You're questioning the one single feature that drove its entire success in distribution? Most people don't know any features except the podcast feature.

If your goal is to address the more underlying concept of getting across knowledge in a quicker more readily absorbed format using LLMs, there's already an insane amount of competition and noise.

The podcast thing was the only reason NotebookLM cut through that noise, so the question shouldn't be "is it one of the most used features" (due to the way conversion rates work it will be btw, it might not be the most used feature by people who stay but obviously the feature that's highest in the funnel drawing people in will be your most used feature) but imo the more relevant question is "is it one of the most important features", and the answer is yes.