QA testers could write recordings out, sure, but taking a recording from a crash and then playing it back locally to 1. inspect the crash with full debugging po

QA testers could write recordings out, sure, but taking a recording from a crash and then playing it back locally to 1. inspect the crash with full debugging powers (stepping through code, seeing the full heap, etc.) and 2. being able to fix the crash and re-run the recording to verify the fix corrected the problem, were both a more common and valuable use of the recordings.