Sorry, to dig up this old thread, but as much as i like doing homebrew stuff for obscure platforms, it was the commercial companies that brought these machines to their respective levels of success in their heayday, not the Public Domain scene.
The average Joe bought his Amigas for being able to use Deluxe Paint, to play Turrican, etc.. Most people i knew around the time in the late eighties were not even aware of the existence of the Fish disks.
Given the incredible hypothethical idea of the Amiga having commercial success again, would you scorn Adobe for charging you money for their port of Photoshop to the Amiga? Or Steinberg for Cubase? That would be plain dumb in my view.
It's okay if someone wants to make a buck with coding up something that a lot of people would like to use/play. And they can always choose not to use it anyway, isn't it?