That's a great question hbarcellos, for me it is the original architecture of the Amiga system, be that the hardware (which is now totally redundant when compared to even the most basic machine- ie raspberry pi). But far more interesting is the Operating system, and I'm keen to know how the Amiga OS architecture works on modern hardware, for that reason I'm involved with the AROS project (and have been for nearly 15 years), which unlike the other "next gen" amiga OS projects, is AmigaOS 3.1 running on modern hardware, and I find that exciting.