My most important takeaway from my past projects is. No matter how cool/sophisticated your product is, people are interested in solving their specific problem

My most important takeaway from my past projects is. No matter how cool/sophisticated your product is, people are interested in solving their specific problem and won't discover most of what your product can do. They are coming to your site/product because they tried to solve a specific problem. So focus on a very narrow use case and make that as simply and frictionless as possible to solve (installers for all platforms, bundled libraries, simple tutorial for the main use cases people are downloading your software for, ...). Your product may still support all the cool stuff you put into it, but accept the fact that most people wont use those features. Once your user is invested in your software he might try to expand his use further which is what might keep your users invested, but to get there you need those specialized narrow key use cases that are your hook to get them.