Amiga is an incredible piece of hardware, a computer like none other. Either you want to play with the computer, or you want to play games that was coincidently released on the Amiga. Not everything is nostalgia, someone actually love the hardware, and my amiga will soon be powerful enough to be an alternative to my PC. I will have my amiga in one room, and the PC in another, both connected to the internet.
Therefore, for some people, Amiga isn't nostalgia. It's an interest that goes beyond nostalgia.