MOS guys were offered a position with the OS4 team but rejected it because they were quite happy with their rebellious amigawannabe MOS system. At no stage was MOS ever considered for the future AOS.
You should really check your sources !!
Back in early 01 when AInc had their "earthquake" MOS was
seen as the best/easiest way to get OS4 offground and a
deal was agreed. All was fine until a well-known lawyer jumped in
and chamged the contracts (has been admitted by Ben himself).
AFAIK Ben demanded that CGX would be replaced with P96 (why ??)
and that wider HW-support was promised.
Nothing really important, but when that wasn't agreed on the
contract suddenly changed to a point where AInc would gain full
control over MOS (including sources) without giving anything
substantial back.