[timbit42]

One thing modern OSes still don't do that the Amiga did is datatypes. If your Amiga didn't have the JPEG.datatype file, the OS and your apps couldn't use JPEGs, but once you added it, the OS and ALL your apps supported JPEG.

[Cockbrand]

That is very true, and it's kind of amazing that this hasn't been picked up by contemporary operating systems.