PPCs Mac work perfectly.

If MorphOS was going to switch to another architecture it would be x86 because it's cheap, fast, easy to find, has a wide variety of options (from low power to high performance) and MorphOS developers already own x86 machines. In contrast that ARM thingies are vapourware and show quite poor performance in practice.

Buy a Mac Mini or a Powermac. These are cheap and you won't regret it.

Why should they show you a timetable?

Forget the hippy ideas of MOS&OS4&AROS teams working together.