how to understand "that ‘unconventional path’ ship sailed a long time ago"
"that ‘unconventional path’ ship sailed a long time ago; I am in this career for the duration; I’ll think about what I want to do when I retire.” how do understand "that ‘unconventional path’ ship sailed a long time ago"?

Question

Answer

To say "that ship has sailed" means that that option is not available.
The writer's option to take an unconventional path was rejected or became impossible, a long time ago.

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