Not sure why David would feel compelled to make such a long explanation.
Frankly, I'm baffled at the idea of running AROS on an expensive PPC when there is already a more mature, faster X86 version.
Sure the SAMs don't run MorphOS, but since they do run OS4.1 I'm not sure why Jason would want to expend this much energy on this.

Mind you, this is solely MY opinion, but as AROS is freeware designed to run on relatively low cost hardware, focusing on X86 and ARM makes more sense to me.

Since MorphOS and OS4 are commercial products, I can justify spending slightly more on the hardware needed to run them.