Im not updating to windows 10+ until they bring it back. I have 3 16x9 monitors. Why do I have to use 16*3 width of my screen for the taskbar when 1 vertical

Im not updating to windows 10+ until they bring it back. I have 3 16x9 monitors. Why do I have to use 16*3 width of my screen for the taskbar when 1 vertical taskbar in 1 screen is enough?