Transitioning the Internet to post-quantum, especially for digital signatures, is a massive undertaking. By setting a 2029 goal, they are giving themselves some slack. If they target 2035 and miss by 2 years, we are getting uncomfortably close to the danger zone.” https://arstechnica.com/security/2026/04/while-some-big-tech-players-accelerate-pqc-readiness-others-stay-the-course/