[Thanemate]

>but the customer will almost certainly let you know when this happens

The customer won't be able to tell you "you're going too fast", but he will tell you that stuff break. On top of that, because the rate of shipping new features doesn't necessarily match with the rate of usage of said features the moment you'll find out about it will not happen ASAP but probably sometime later, making it even harder to truly know if going fast is the right thing to do in the moment.

[baliex]

> The customer won't be able to tell you "you're going too fast", but he will tell you that stuff break

This is what the GP meant. They won’t spoon feed you the “you’re going too fast”, but they will give you other signals that you can, and would benefit from, interpreting as “you’re going too fast”