Damiano, thanks for the suggestion. However, the result would be for a keypress to produce a notification bubble in cases where the key does nothing, and two notification bubbles when it actually does something. Neither of those seem like a good idea. We do have a few other cases where a notification bubble appears after nothing happens, but those are mainly to reassure you that you've gone as far as you can go, e.g. that you're already at maximum brightness.
Damiano, thanks for the suggestion. However, the result would be for a keypress to produce a notification bubble in cases where the key does nothing, and two notification bubbles when it actually does something. Neither of those seem like a good idea. We do have a few other cases where a notification bubble appears after nothing happens, but those are mainly to reassure you that you've gone as far as you can go, e.g. that you're already at maximum brightness.