There are legitimate reasons to have a CP system and not an AP system, it's obviously application specific. Also over-engineered systems come with their own risks and can experience as much down time as a well setup CP system due to human error stemming from the system's complexity (AWS is a good example).
Very good point. Quite often when talking about distributed system, everyone goes to the CAP theorem and automatically assumes if it is not AP, it must CP then. While in reality (and maybe for good reasons) it might be neither.
