I think this is highly relevant for the early stages of a product: Do you focus on retention or marketing? I'm developing a cross-platform file manager [1]. My current problem is that even tough 20 people download it every day, only 2 use it more than once in the first week. Existing users ask me for 1000s of features. But the real problem I need to overcome for growth is that I lose so many first-time users. That's a problem with onboarding, not with features. I blogged about this [2].
[1]: https://fman.io
[2]: https://fman.io/blog/desktop-app-funnel-optimization/