Luigi Mangione got caught because he messed up. A simple change of clothes or ditching the very individual looking items he was carrying. If he had done that, you wouldn't have had a facial ID on him.
The Nancy Guthrie case on the other hand went nowhere, because we couldn't definitively make a match.
On the other hand we have multiple instances of bad data causing people to be subject to being targeted by the police. We have police threatening or arresting people based on a lack of corroboration. Some times ignoring clearly exonerating evidence.
The world is a better place without license plate cams.