Right now, an unresolved assigned comment only blocks closing the task. In practice that's often too late: the issue needs to be fixed before the task moves to a specific stage (for example "Client review" or "Ready to print"), not at the very end.

I'd like an option, when creating or assigning a comment, to choose which status it blocks. As long as the comment isn't resolved, the task can't move to that status (or any status after it).

these blockers are contextual and decided case by case (a missing file, a client validation, a correction to check). You can't predict them with rules or required fields, and they belong in the conversation where the problem was raised.