AFAIK, historically that hasn't happened. Sales is shit hard. Getting every single client is an art in itself. You got to be a magician to get even 5-10 clients signed-up readily in one go, for a start-up. And by the time you are having "N" paying clients that matches your metric for product-market fitness, you start evolving your architecture to the next level. This is where Product and Engineering sit-together to take that strategic decision on the path forward.