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I try to do UX design with real data too. Not sure if that is what you mean with heterogeneity?

• hamdouni 1y ago
  Not quite UX-focused, but related I meant data heterogeneity - the variety in formats, edge cases, and data quality you encounter in production. Real user data often has inconsistencies, missing fields, unexpected formats, etc. that synthetic test data tends to miss. This helps surface integration issues and performance bottlenecks early.