[Interest] Are slots even needed these days?

[Nikos Chantziaras]

Since in modern Qt you connect signals to functions/lambdas, is there a 
reason to declare slots anymore?

In other words, is there any difference between:
  class Foo: public QObject {
      Q_OBJECT

  public slots:
      void bar();
  };

and:

  class Foo: public QObject {
      Q_OBJECT
  public:

      void bar();
  };

I can connect to Foo::bar either way. If I don't intend to ever use the 
old-style connect syntax, is there a reason to have "public slots:" anymore?

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