Reaction: Whomever works in PRODUCT at Google has egg on their face.
An interesting idea:
One could use this feature, and the special site:https://bard.google.com/share URL (or https://duckduckgo.com/?t=ffab&q=site%3Ahttps%3A%2F%2Fbard.g...) to have Bard host arbitrary conversations.
EDIT
Found some cyber-stalking / self-investigation...
* https://bard.google.com/share/24802050c1d2