The thing is that Face ID DID work. Others used the phone so it locked up. All good.
I don't remember any complaints or worries about TouchID if it's going to work or not. The only concern that I heard a lot the first time Apples introduced is security. A lot of questions that time how safe our fingerprints stored on iPhones, or concerns if the government could access the fingerprint data. Fingerprint technology is already a matured technology when Apple integrated it on iPhone. On the other hand facial recognition is a fallable technology. Although Apple has added some layers of technology but a lot of questions how accurate or how safe it is. Considering the fact that it already failed on day one of demo that raises more qiestion. So many unanswered questions and uncertainties about this technology. It will get better that's for sure but it takes time.