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Renaming is work that doesn't improve the functionality.

• smsm42 4y ago
  Only is you see "functionality" as "code being run in production". A lot of things then don't improve "functionality" - design documents, comments, use cases, tests, documentation, tutorials, etc. Proper software project still does all of it.
• xpe 4y ago
  Functionality isn't all that matters. Software has many other aspects.