I am usually not someone who falls into the "what do they need so many people for, it should be simple"-trap but I was still surprised to learn that Lyft has 40

I am usually not someone who falls into the "what do they need so many people for, it should be simple"-trap but I was still surprised to learn that Lyft has 400 engineers and Twilio has around 300 too. I am note sure they would be that big if they had to finance everything out of their profits, but i guess it's a good way to maximize progress, on the other hand they also had a lot of challenges with growing dev teams.