Which is bad enough by itself, but if you are using multiple monitors/workspace CMD+` will only switch between windows of that application that are on the same workspace.

... and not even that ... it changes direction every time you use it and it even very slightly reorders things in a way I still can't predict.

(see my other comment above)

You are right. It reassess the order of windows when you change application. And here I just thought I was bad at keeping track of my windows.

Another thing I noticed just now is you can browse to no-window-selected using cmd+`

As far as I can tell, the logic is the following, with numbers representing order of creation, with 0 being no window:

    [3,2,1,0] 

If you switch app with window 3 selected, the order is maintained. If you switch with window 2 selected, the new order will be

    [2,3,1,0]

if you switch with window 1 selected, the new order will be

    [1,2,3,0]

If you switch with window 0 (no window) selected the new order will be

    [0,1,2,3]

The amazing thing is, there is an entire company (Apple Computer) full of thousands of people that have to use this every single day ... what the fuck ?

How do they manage to not fix this ? How do they live/cope with this ?

One theory is that there are no power users at apple computer - just a bunch of people mouse-mouse-mousing around their computer all day, every day. I think that's unlikely.

OSX power users that actually work at apple ... why don't you get this fixed ? I live with this pain because I have no way to do anything about it ... why do you live with this pain ?