The answer is, as usual, "it depends". Your homegrown service is unlikely to have a 20 hour outage, by being much simpler. Whereas if you use any cloud solutio

The answer is, as usual, "it depends". Your homegrown service is unlikely to have a 20 hour outage, by being much simpler. Whereas if you use any cloud solution at all, you become a part of a huge and complex system that is likely serving orders of magnitude more requests than your service. And that can go down by reaching situations that would never be seen in your service. The flip side is, your service is probably peanuts to them. Should you grow using your own tech, you'll hit the same pain points that they have, in their very beginning, probably even during the MVP. They have already taken care of that so you won't have to.