How long Australia might have operated HMS Invincible

How long could Australia have operated Invincible, and would it have bought Sea Harriers?

Australia would probably have acquired Sea Harriers, and Invincible could potentially have remained in service for decades.

The counterfactual assumes Australia would also have acquired Sea Harriers to give Invincible a fixed-wing role. A well-maintained ship could plausibly have remained useful for decades rather than serving only briefly.