Counter-example: well-planned migrations can produce 3-5× traffic gains (BrightEdge / Numen case studies)

Claim: Documented case studies show 3× and 5× traffic gains when migration is executed with: complete 301 redirect mapping, content preservation, pre-launch redirect testing, and post-launch monitoring.

Sources: BrightEdge migration case studies; Numen Technology 2024-2025 case studies.

Confidence: Industry-consensus (vendor-published; specific named cases).

Why this counter-evidence matters: It defangs the strongest objection to migration ("migrations always fail"). They don't — well-planned ones produce gains. The honest framing is: migration is expensive and risky by default, but the risk is recoverable with discipline. Use to make the "we charge for the discipline" argument when pricing migration engagements.