We've changed the URL from https://www.apple.com/newsroom/2020/06/apple-introduces-maco..., which is a corporate press release.

If there's a better URL for discussing this, we can change it again.

Edit: it looks like https://developer.apple.com/design/human-interface-guideline... is probably a better URL for discussing this, so we'll change to that from https://www.apple.com/macos/big-sur-preview/.

Edit 2: since https://news.ycombinator.com/item?id=23606052 posted that and is now on the front page, maybe it's better to just let the discussion pick up there. This thread is pretty generic. Perhaps an article with more detailed information will lead to a more interesting discussion.