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 Don’t know if this would scratch your itch, but I remapped “press and hold” to shift-tab. I was on a QMK keyboard, but Karabiner or KMonad should be up to it if you’re on a Mac.
@pgroce Someone else suggested it too, but I use tabbing too quickly for this to make sense for me…