Anthropic will now retain all user data for five years, and has reversed course on using chats for training; they will. Sep 28 is the deadline to opt out. I just did, and the UI is a master class in dark patterns. https://techcrunch.com/2025/08/28/anthropic-users-face-a-new-choice-opt-out-or-share-your-data-for-ai-training/