what if i3bar showed ALL workspaces regardless of output

notes.txt

In the actual config for this, these would be 4 color settings in the bar block. Here I'm just using symbols instead.
[n] is focused, on this ws
 n  is unfocused, on this ws
<n> is focused, on another ws
(n) is unfocused, on another ws

output 1 workspaces:
1 [2] 4
output 2 workspaces:
[3] 5 6

output 1 bar:
1 [2] <3> 4 (5) (6)
output 2 bar:
(1) <2> [3] (4) 5 6

For more than 2 outputs, both other-ws+focused workspaces would be the same color.

*In theory* you could write an implementation that lets you set focused-unfocused bindings for each output so you could tell them all apart at a glance, but that's way too much to ask of this, and probably not that much more useful (if at all). I include this here just for completeness, I guess.