dispensability

/dɪˌspɛnsəˈbɪləti/
noun
  1. The quality of being able to be done without; unimportance or non-essential nature.
    • We questioned the dispensability of that rule in the new system.
    • The dispensability of the extra features made the product cheaper.
    • His role's dispensability became clear when the team worked fine without him.
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