I came across a question that had recently been migrated from another site, after which an experienced user added a standard asking-for-more-information comment. But I then noticed that the question's OP wasn't a user on the target site (their name was greyed out). It made me wonder if the commenter wasn't shouting into the wind.
When a question is migrated to another site, are askers/answers who aren't members of the target site notified of later comments/answers?
The question Are users notified when their question is migrated to a site they're not a member of? asks if the users get notified of the migration, but there is seemingly nothing about what happens afterwards.