AI shifts jobs by task bundles, widening the gap between junior and senior coders

New research using official labour statistics corroborates private payroll data, showing about half a million fewer coders today than pre-LLM-era trends. The 'bundles of tasks' framework explains why junior and contractor coding jobs are more exposed to AI displacement, while senior developers and domain experts resist as AI automates lower-value tasks and multiplies the rest, implying a widening divide in white-collar work as AI capabilities grow.