None of this will matter in the long run. The CPU is just a component.
Nobody cries that SCSI isn't the defacto standard these days, regardless of it's technical superiority, but somehow CPU's are sacred. Price, availability and performance be damned.
OS4 and MorphOS dragging their feet in PPC land are just bringing about their own demise. The longer they wait to go x86, the more AROS catches up.
Like it or not, when AROS eventually catches up usability wise, market forces will put x86 as the main CPU. There are just too many cheaply available for it not to happen, it's inevitable.
OS4 is never going to be ported, but with the lead MorphOS has, if they moved to x86 now they could probably hold on to the majority of users based on having a polished, professional product and not lose the market to AROS.
Time will tell.