> If I want to learn about new features I'll go to the Help menu.

No you won’t. There’s nothing wrong with announcing new features, as long as it’s not disruptive and obnoxious, like a pop up. Linear[1] for example adds a small insert at the bottom of the sidebar. It doesn’t take too much space, it’s easy to close, and you can ignore it for as long as you want, it doesn’t prevent you from working. IMO this is the right way to show new features.

[1]: https://linear.app