It seems that IBM supporters are FUDing again against the competition. Knowing that the new coming POWER9 is slower than the current SPARC M7, the IBM crowd has tried to combat the competition with false rumors instead. Fact is, IBM executives have said that AIX is going to be canned, and replaced by Linux:
https://www.cnet.com/news/ibm-linux-is-the-logical-successor/
"...The day is approaching when Linux will likely replace IBM's version of Unix, the company's top software executive said... While IBM doesn't expect Linux to replace its own AIX version of Unix any time soon, Big Blue is pushing the open-source OS in the that direction, Steve Mills, senior vice president of IBM's Software Group, told CNET News.com.... Asked whether IBM's eventual goal is to replace AIX with Linux, Mills responded, "It's fairly obvious we're fine with that idea...It's the logical successor....The road map is clear. It's an eight-lane highway."