The use case is all the situations where a mouse is not available. You already discovered several, and you're only scratching the surface.
The truth is that you cannot predict all the scenarios and possibilities out there, no matter how hard you try, and it is naive and arrogant to pretend that you can.
For me personally, mouse use comes with a huge ergonomic hit, and results in discomfort and pain.
Keyboard browsing (I use qutebrowser) is also much faster and more efficient once I've conquered the week-long learning curve.
Keyboard support also has a long history in browsers, with Opera 4.x being one of the pioneers of one-key shortcuts, though not vi-style.
The truth is that you cannot predict all the scenarios and possibilities out there, no matter how hard you try, and it is naive and arrogant to pretend that you can.
For me personally, mouse use comes with a huge ergonomic hit, and results in discomfort and pain.
Keyboard browsing (I use qutebrowser) is also much faster and more efficient once I've conquered the week-long learning curve.
Keyboard support also has a long history in browsers, with Opera 4.x being one of the pioneers of one-key shortcuts, though not vi-style.