My answer to most scaling question is: by the time we have that problem, we'll have a lot of customers and money so we'll hire smarter engineers with experience

My answer to most scaling question is: by the time we have that problem, we'll have a lot of customers and money so we'll hire smarter engineers with experience in scaling to figure that out. I still make sure we don't do anything stupid right now so the future engineers have more options on how to scale. Also it helps that I'm not working on a zero-revenue consumer app.