Complexity can solve issues but can also bring new ones.

For instance, I've been bitten recently by the new "universal" syntax to write variable definitions with only curly braces.

  #include <iostream> 
  #include <string>
  #include <vector>

  using namespace std;

  int main() {
    // Forty-two things:
    vector<string> v1 { 42, "foo" };
    vector<int>    v2 { 42, 1 };
    vector<char>   v3 { 42, 'x' };

    cout << v1.size() << " " << v2.size() << " " << v3.size() << endl;
    return 0;
  }

This prints, of course:

> 42 2 2