Naturally, I'm biased, but I don't think I can agree with any of this.
Frankly, I have PCs. And I run Windows, OSX, and Ubuntu.
But I really like MorphOS and believe OS4 is progressing reasonably well.
Both run Amiga PPC software far better then a PPC equipped Amiga and either will run newer games and software ported to these platforms.
Further, if you've developed software under Amiga OS3.X, adapting to a MorphOS or AOS environment is relatively straight forward.