[gpderetta]

Pragmatically you can write your code in such a way that you can get immediate feedback in your IDE as you write the code if a static assert fails as you are implementing your function.

You could of course set up your runtime tests in a similar way, having the ide run them back to back as you are writing code, but it is more complicated, especially if the code is in an intermediate state that it is not fully compilable.

So in the end it is not a huge breakthrough, but having compile time tests is still quite a nice feature.