I've worked at Microsoft and other BigN companies and the training and culture around what gets written down is absolutely there at any big enough to have been

I've worked at Microsoft and other BigN companies and the training and culture around what gets written down is absolutely there at any big enough to have been sued. This is why you're reminded to not discuss ongoing lawsuits over email. It's why you're reminded to never use aggressive language like "we will crush our competitor" or legally sensitive language like "I think this will harm our customers". It's why mail retention/litigation hold exists, and why most people who end up in retention will go out of their way to call or tall in person rather than over chat or email. There are two kinds of people: those that think retention policies and these trainings are stupid, and those that have been proximate to a lawsuit and understand exactly why these rules exist. I had plenty of managers and PMs at Microsoft who went out of their way to keep things off email; that instinct wasn't as strong at Google, but that'd because Google hasn't gone through a lawsuit of that magnitude. There's a great internal copypasta by a lawyer at Microsoft titled "Apropos of Nothing" that goes into the specific legal details and dollar implications of this kind of language but it's not publicly available.