How Google spent 15 years creating a culture of concealment

If anything you ever say during routine business operations can end up as evidence, clear and honest communication will suffer. The effectiveness of organizations, including the ability to act ethically, will be seriously degraded.

There needs to be some kind of work product doctrine, which protects the privacy of routine business communication. Defining that, while allowing the collection of evidence of criminal activity, won't be easy, but the current state of affairs is unworkable.

I don't wish to facilitate corporate crime, and it's obvious that some of Google's anti-competitive behavior is unlawful. But, I don't see any realistic alternative to what Google is doing in the current legal environment.

Is something like Signal disappearing messages illegal?

I remember when Mark Cuban tried to make his CyberDust app.

google made internal chat messages disappeared after N days, which was disclosed in one of the trials, but I do not recollect any following punishment.

Like many US big companies, Google activated the court-sanctioned evidence destruction machine. (AKA "Document Retention Policies")

Because this form of evidence destruction is viewed as legal by the courts if you're not a "highly regulated" business like a bank, unless you've been specially and specifically ordered by the courts to preserve evidence there is no punishment for destroying evidence in this way.

A few years back, Google execs did choose to continue to destroy evidence after a court ordered them to preserve evidence and turn off their evidence destruction machines. I do not remember whether or how severely they were punished. (If they were, surely the punishment was far less than it would have been for we mere peons.)