When the MacBook Pro came out with the top-row touch bar, a lot of people were confused and didn't like it. But for me, after a few weeks of using it… I'm confused and don't like it. The per-app buttons almost never expose anything that didn't already have a keyboard shortcut, and restricting the appearance to icons doesn't let you tell what they do.
Plus, the touch target on that "expand" widget is tiny (which wouldn't be so bad if it was an actual, tactile BUTTON)
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