https://arstechnica.com/tech-policy/2023/03/google-defends-auto-deletion-of-chats-after-us-alleged-it-destroyed-evidence/

Google defended its use of "history-off chats" for many internal communications, denying the US government's allegation that it intentionally destroyed evidence needed in an antitrust case. The history-off setting causes messages to be automatically deleted within 24 hours.

The US government and 21 states last month asked a court to sanction Google for allegedly using the auto-delete function on chats to destroy evidence and accused Google of falsely telling the government that it suspended its auto-deletion practices on chats subject to a legal hold. Google opposed the motion for sanctions on Friday in a filing in US District Court for the District of Columbia.