To the point of another post, I don't think they are mutually exclusive unless the exit interview is held by the same person who you would normally voice daily

To the point of another post, I don't think they are mutually exclusive unless the exit interview is held by the same person who you would normally voice daily concerns to (e.g., direct supervisor). Many organizations have exit interviews scheduled with people many levels higher precisely because they recognize the middle-managers won't have the ability to sanitize the feedback first. Meaning it's possible to have been voicing concerns the entire time but not have them reach the same level as you'd get at an exit interview. I look at exit interviews as an accountability measure for mid-level management.