> you cannot easiliy benefit from software optimizations done by the gazillions
> of developers for x64 (like the well known JS or JS JIT examples that impact
> our small comunity pretty hard).

This is only true for a small part of the "software optimizations done by the gazillions of developers for x64", even if some of them have relatively big impact for us. Fortunately, the vast majority of software optimizations is done in scalar, endian-agnostic code written in high-level language.

> ppc is not really progressing any more.

It is, just not in an area that would benefit a desktop operating system.

http://morph.zone/modules/newbb_plus/viewtopic.php?forum=3&topic_id=9463&start=87