I think my dream keyboard would have a slightly wider Tab that would be split into two, Back Tab and Forward Tab.

Tab is such a heavily used key that it would be nice to give it more to do, and free up ⇧ to mean something else, too.

@mwichary what if forward tab was as it is now on the left, and back tab was its mirror image on the right?
@PsySal Some keyboards did that back in the day! But I think it’d be both nicer and easier to use if they were side by side – like the arrow keys.