Based on my work Power processors are simply the backbone of AIX and iSeries machines and perform very well in those applications. The interesting part is that

Based on my work Power processors are simply the backbone of AIX and iSeries machines and perform very well in those applications. The interesting part is that either platform can move off the Power processor to another, the least impacted from a business perspective would be iSeries as the layer above the machine level is independent and would simply rebuild programs without customer intervention beyond upgrading the OS