[sida]

This comes up a lot (ohh it is a just a crud app and you just need a couple of people)

This is fine and it is common misconception about how large app businesses work. (kudos to airbnb for making complex things look so simple)

Here is a great post about Uber and why Uber gets complex (once you have many product lines across hundreds of cities, each with their own subtleties and rules/regulations) https://news.ycombinator.com/item?id=25376346