Delphi：从什么时候接口引用不再在with-block结束时释放？

显然(在Delphi 2009中)这不是(不再是？)的情况.有谁知道这发生的时间？或者我的代码开始时是完全错误的？

为了澄清,这是一个简化的例子：

type
  IMyIntf = interface;
  TSomeObject = class(TInterfacedObject,IMyIntf)
  protected
    constructor Create; override; // creates some sort of context
    destructor Destroy; override; // cleans up the context created in Create
  public
    class function GetMyIntf: IMyIntf; //a factory method,calling the constructor
  end;

procedure TestIt;
begin
  DoSomething;
  with (TSomeObject.GetMyIntf) do
    begin
      DoStuff;
      DoMoreStuff;
    end; // <- expected: TSomeObject gets destroyed because its ref.count is decreased to 0
  DoSomethingElse;
end; // <- this is where TSomeObject.Destroy actually gets called

每当有人开始使用旧的“带有邪恶”的论点时,这始终是我心中的一个例子,让我继续“是的,但……”.好像我错了……有人能证实吗？