"I still don't understand where idea "if you solving a problem and decide to use regular expressions, then now you have two problems" came from." Nor do I. I

"I still don't understand where idea "if you solving a problem and decide to use regular expressions, then now you have two problems" came from." Nor do I. I have surmised it arose from people trying to use RE in non-systems programming languages. As opposed to people writing console utilities in a systems programming language or using such utilities to administer a UNIX-like OS.