OS/2 for PowerPC was undoubtedly an interesting experiment, albeit a failed one. It is impossible to tell whether this failure was caused more by shortcomings of OS/2 for PowerPC or the failure – perhaps just falling far short of expectations – of the PowerPC platform as a whole.

Source: OS/2 Warp, PowerPC Edition

I mean, it made sense to try. IBM made both PowerPC and OS/2.