the post already links to a summary, but tl;dr
the state seeks to charge Meta for supporting grooming of minors, because adding chat encryption obstructed law enforcement. Criminalizing the design decision to add encryption might deter all companies.
Some of the most damaging evidence in both trials came from internal company documents where employees raised concerns about safety risks and discussed tradeoffs. [...] the rational corporate response is to stop putting anything in writing. Stop doing risk assessments. Stop asking hard questions internally. [...] That makes everyone less safe.