For anything in the top ~1% of the human social ladder - you can count on the politicians, plutocrats, etc. who make the rules in human society being extremely reluctant to allow AI's to start replacing their own kind.
Your "can't ever" is too ambiguous. If "ever" allows thousands of years, then it's purely a philosophical/linguistic question. If you're mostly interested in credible threats to your own career, then it's more a technology/society question.