The update does not in fact affect data sharing with Facebook with regard to user chats or other profile information; WhatsApp has repeatedly clarified that its update addresses business chats in the event a user converses with a company’s customer service platform through WhatsApp.
You would expect the largest social media company in the world would be a tad better at communicating with its users. Meanwhile, Signal is growing so quickly they’re having service outages. They say on Twitter they’re adding new servers and capacity every day this week. You’re growing too fast is a great problem to have — and it’s all thanks to Facebook. And Elon. And you know, just having a really good, privacy-focused app that people feel safe using.