It's written by people who like(d) AmigaOS.
...and it's expensive. It'll cost you more than the MacMini.
MacMini G4 : 250/400 E (depending cpu speed, HDD, CD or DVD or DvdRW drive...)
Mos 2.4 : 150E ...
Like Atari Jaguar's add said " do your maths...!!"