Why does this website show a historical question of any previous user randomly when you click the roll the dice icon and have you considered this being a privacy concern?

It seems like your question is about a website feature that shows historical questions when clicking a "roll the dice" icon, and whether this could be a privacy concern. While this isn't directly related to the content presented by Apple at WWDC, I can provide some insights into privacy-related topics discussed at the event.

At WWDC 2024, Apple emphasized privacy in several sessions, such as "What’s new in privacy" and "Build immersive web experiences with WebXR." These sessions highlighted Apple's commitment to user privacy by introducing new tools and features designed to protect personal data. For example, iOS 18 and macOS Sequoia introduced new pickers that allow users to share only the data they want, enhancing transparency and control over personal information. Additionally, the WebXR standard prioritizes user privacy and security by requiring user interactions to start sessions and ensuring that immersive experiences are easy to exit.

If you're interested in learning more about Apple's privacy initiatives, you might want to check out the session What’s new in privacy (00:01:07), which discusses the principles and new features designed to enhance user privacy.