[foobiekr]

I have a coworker who, when he got out of school in the 90s, got hired to write COBOL. There's a ton of COBOL out there, and why not? As much as "waterfall" is a fiction, high-spec, super-detailed-spec projects actually do have some advantages as they are usually well thought out. That is where COBOL played, and why those apps have run since the 70s.

[Aloha]

Sometimes the entire specification really does exist before you start. Certain kinds of software applications have not had substantive new functionality in decades, so everyone knows what a complete implementation of it looks like.

[foobiekr]

Alternately, they change slowly, and they have to be right.