Oh man that brings memories. It's so sad that things like datatypes or xpk didn't made it to modern OSes (well, there's just fraction of it, I guess video codecs are closest thing to it, but that just targets one area).

I also wanted to point out that this standardization made it possible to "pimp" your AmigaOS to make individual desktops somewhat unique. There were basically libraries that substituted system libraries and changed how the UI looked or even how it worked. I kind of miss that. Now the only personalization I see is how the terminal prompt looks like :)