title: Is there a reason not to use the newest C++ standard?
body: <p>I have seen that the default standard in IDEs is usually not the newest released standard, not even the newest standard in the IDE.
  For example JetBrains' Clion has C++20 and C++17 but the default option is C++14.</p>
  <p>Is there a reason not to use the newest released standard?</p>