You may want to develop deep subject matter expertise! As you become an expert on radio telescope arrays or the sport of curling you'll see the problems that a

You may want to develop deep subject matter expertise! As you become an expert on radio telescope arrays or the sport of curling you'll see the problems that are outside the scope of a spreadsheet. Meanwhile be part of the community surrounding it so they trust you and your understanding. Otherwise you need a pathbreaking stroke of genius, a mountain of cash to burn, or the willpower and charm to get the world to choose your product app over the other 50 products that are very similar.