> In fact, C++ offers classes and structs. In my opinion, struct should be used for entities like "weapon" or "car". CLASSES (or objects) should be unix-philosophy adhering miniprograms that do one task and do it well (oh hey, it's the single responsibility principle!).

Please no. The only thing that matters is the language rules ; any non-computer-encodable arbitrary rule like this on top of the language rules just causes an additional lava layer.

There is one difference between class and struct and it's default visibility. Use one or the other according to which causes less tokens to appear in your code