it just wasn't airworthy
Well DV, that is where you and I disagree. I think I understand the difference between serviceability and airworthiness thanks. A combination of unforseen events may, or may not, have caused the accident. Hundreds, if not thousands of similar AAR events happened without incident, so for a coroner to say that the aircraft was unairworthy was somewhat disingenous. What was deemed safe engineering practice in the 1960s or evene the 1980s might not be deemed safe today, but it might just as equally not be unsafe.
The MR2 was taken early, as a savings measure, by the previous government. Most of the people I know who were flying the aircraft at the end were not concerned about the airworthiness and would have been happy to continue flying the jet.