Some interesting discussion is happening at Raymond Chen's blog, “The Old New Thing” in relation to C++ and C#. Raymond recently wrote an article on “What is purecall?”. In the comments at Raymond Chen's blog for “What is purecall?”, I commented / questioned
Centaur pointed out that constructors served as initializers. M Knight said that “Delphi constructors are really initializers”. And then, Henk Devos pointed out that “In reality it means Delphi does not have real constructors”.
Take a look there...
In 2017, with the release of Delphi 10.2 Tokyo, Embarcadero introduced a specialized implementation of the Observer pattern into the System.Classes unit. While it has been in the wild for 9 years, it remains a "hidden" architecture for many, primarily because it serves as the invisible engine behind LiveBindings. Other than live bindings, you can also use the Observer pattern as a way to update component settings to the Windows registry, an .ini file, or persist it elsewhere.
System.Classes