Exactly. Usually the bottlenecks will appear at places you didn’t expect them in the first place. So I tend to build a system that can handle the load that is

Exactly. Usually the bottlenecks will appear at places you didn’t expect them in the first place. So I tend to build a system that can handle the load that is expected, and some reasonable scaling (maybe 5x to 50x more load). If your product grows way faster then expected (1000x), you will probably have way more budget, and be able to do it even better.