Microsoft is hyper afraid of "PII". When they ported a bunch of blogs (including Raymond Chen's) to a new platform, they did not bring the comments along becaus

Microsoft is hyper afraid of "PII". When they ported a bunch of blogs (including Raymond Chen's) to a new platform, they did not bring the comments along because GDPR would have required them to associate accounts on the old platform with those on the new, to comply with the deletion requirement.