As expected, most of the features were rare on home computers at the time, but have become ubiquitous (or unnecessary) on modern computers. HOWEVER, the `Datatypes` feature is really cool and would actually be a nice feature that still doesn't exist in Windows, macOS, or Linux. https://wiki.amigaos.net/wiki/Datatypes_Library
The peak of this was ActiveX; in Microsoft's world around 2000, they really wanted you to be able to embed controls and programs in web pages and then put those web pages everywhere, including on the desktop background ("active desktop").
The problem of running third-party code inside your application is not just security but it tends to crash bady and put the name of the hosting application on the crash. Eventually Microsoft got so fed up with that, especially in the kernel, they built a system where video drivers could crash and restart while the OS kept on trucking, and use of COM has faded.