Okay I might have been a little harsh, but when someone seems intent on believing the worst.. its slightly annoying.
OS 4.0 Development Update from January 2002.
http://amiga.realdreams.cz/local/21_1amigaos4.htmlExec Second Generation (Exec SG)
Exec is the kernel of the AmigaOS and is currently written in 68K assembly.
Exec is being re-written in C and new functionality will be introduced to allow the deployment of OS 4.x on any suitable PPC hardware.
(end quote)
Re-written in C, which means able to be recompiled for PPC, not stuck on 68k.