My beef with macOS Safari (I use it) is simply that they don't render tab switching on the touch bar as favicons.

I'm looking down on the touch bar, and it's an indecipherable blur of basically identical tiny renders of web pages. I've never once found it useful, and the tab view has favicons (finally), if the touch bar had them I would likely use touch bar switching fairly frequently.

To be fair, no other browser does this obvious thing, either. I don't understand it.