When NOT to Use

Avoid forcing this pattern when:

• Single string search: Hash set gives $O(1)$ for exact match. Trie overhead isn't worth it.
• Few words, no prefix queries: Simple array or hash set is cleaner for small dictionaries.
• Memory constrained: Trie can use substantial memory for sparse character distributions. Remember: forcing a pattern where it doesn't fit leads to overcomplicated solutions.

If you find yourself fighting the approach, step back and reconsider whether another technique works better.