Well, that sounds about right from my experience, for some type of code and organizations. The original developers have left after a few years, newcomers don't

Well, that sounds about right from my experience, for some type of code and organizations. The original developers have left after a few years, newcomers don't understand the system and may not even try to. It will ultimately get rewritten in newer technologies and frameworks, that happen to be nice for their resume, whether it was obsolete or not.