One language feature from Delphi (or Pascal?) that I wish modern languages had is class properties

No getter/setter bs. When creating a class you declared a field a property, it looked like this

  type
  private
         FBar: Integer;
         procedure SetBar(Value: Integer);

  published
  property Bar read FBar write SetBar

so you specified what method was to be called when assigning to the propery and when reading from it. You could start with both read and write accessing the field directly and then later make them use getters-setters while keeping the class interface the same. Somehow this knowledge got lost by designers of modern languages unfortunately :(