AIX doesn’t even keep separation between the command history in different windows on different machines for the same user ID. Ask me how I know 
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only had a brief stint with it, but it’s proper dogshit.
HP put me through a 10 day course for AIX, run by one of their top admins sent over from the states.
Very comprehensive training covering some very indepth virtualisation approaches, large volume user config and management etc.
I totally agree, its utter dogshit.