I would love to have this feature too, currently have my physically secondary monitor set as primary in windows just to have the primary taskbar on it.
Sounds like the original post actually wants two different features, enabled at once - ability to hide/disable all taskbars except the primary one and move the primary taskbar to any monitor. I'm mostly interested in the "move the primary taskbar to any monitor" while still leaving secondary ones on other monitors.
There is a way to do it, which unfortunately is incompatible with Start11, at least when it is set to be on top. There is a "Primary taskbar on secondary monitor" mod on Windhawk (I do not endorse it here in any way, try at your own risk, even tho it is open source, both the client and mod itself). It does seem to work without start11, but with start11 on top it moves the primary taskbar on secondary monitor, but does not move the secondary taskbar on primary monitor, so you are left with just the primary one with nothing on other monitors. This seems to be exactly what NonameFTW2860 is looking for, but there is a catch - when you try to maximize a window, it still thinks the taskbar is there, leaving empty space at the top.
