I’m not sure I agree with the first 2 reasons. Maybe it’s just a matter of corporate culture. At Nu Echo, we have systematic code reviews, even for prototype / proof-of-concept types of projects. It’s a great way to spread knowledge across the team. And it’s not just senior developers reviewing code from juniors, it’s the other way around too. Both…
Ask Fedex is accessible directly on the Fedex web page (https://www.fedex.com). IP Australia Alex is also accessible on the web (see https://www.ipaustralia.gov.au/about-us/news-and-community/news/meet-alex-your-virtual-assistant).
Honestly, they didn’t give more specific details about those promises during the talk. That was a bit intriguing… (I should have asked!) But of course, banks certainly don’t want to let users make sensitive operations over a channel like Facebook Messenger, where private data transits outside of the bank. Yes, you could use web forms to do that, but you are moving slightly away from the text channel then.