I agree and was about to write something similar. The AROS project that modernises Workbench is a great example of legacy software and hardware moving forward. So are the USB stacks & Deneb. And UAE? These are all current as the day is long. And lets not forget the dozens of new libs and other legacy enhancements (ie: the Amigakit .pdf viewer freebie) to be discovered over at Aminet. Every time I turn around, something new has been released, manufactured, remanufactured, being developed or at the very least, being talked about conceptually (which often seems to come to fruition) - all in the Amiga world.
Forgive my ignorance, but do older Mac and PeeCee platforms (OS & hardware) have such repositories as Aminet? Constant improvements, contributions and developments? I doubt it and for better or for worse, is a side effect to those platforms being mainstream. One could also argue they don't need them as with each and every new OS comes these things, but I'm trying to show just how 'alive' the Amiga still is. How much of a demand there still is. The pulse may not be as strong as a mainstream system, but to say it's completely dead is, well... .