Just a quick word on Delphi support in Singapore.
After I left CodeGear nee Borland, there is no longer any employee in the APAC region performing the role of Technical Support for Borland's IDE products.
As far as I'm aware, there isn't any employee in APAC region performing the same role for Embarcadero (buyer of Borland's products).
Ocassionally, I've been approached to provide my expertise in these areas.
So, anyone needs help, please contact me by dropping a comment here. Comments won't be published (until approved).
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