I promise you that there is a palpable undercurrent as a company grows where you go from "everything is so easy, just be scrappy and talk to the person next to you" to "wow, there are all these scaling edge cases, not everyone is a senior dev/design/marketing/hr who has worked at the company since it's infancy, communication is hard and not everyone is like you" such that you need to spend money on hiring/infrastructure to solve this as the efficiency per person/project/team goes down.
Good luck.