A function should ask for the MINIMUM it needs.
Fewer dependencies = easier to change.
Fowler's advice:
"Most of the time you should ignore performance during refactoring. Finish refactoring first, then do performance tuning afterwards."
"Making the implicit explicit"
Instead of memorizing rules:
- ❌ "Always use fewer parameters" (dogma)
- ✅ "Fewer parameters reduce coupling, making change easier" (principle)
