The typist and the word processor
The typist's job was a bundle of typing, formatting, error correction, and revision. The role existed because each of those tasks was expensive - fixing a single error meant retyping a page; revisions meant manually managing versions across a typing pool.
The word processor arrived. Through the IQ frame, it looked like a productivity tool that would make typists faster. Through the system frame, it was the death of the role: the costs that justified the typist bundle had just collapsed to zero. Typing didn't disappear - it became a distributed task that every knowledge worker absorbed into their own work.
No amount of reskilling would have saved the typist. The system no longer needed a role organised around that task. Companies that watched typist productivity missed it. Companies that watched the workflow restructuring saw it coming years out.