Union-Find is fast, but it breaks for real-world entity resolution because it cannot handle safeguards, reversals, or ambiguous matches. A weighted graph approach with constraints, abstention, and incremental updates works much better at web scale.
Source: [HackerNoon](https://hackernoon.com/graph-clustering-for-entity-resolution-why-union-find-breaks-at-web-scale?source=rss)