I can’t tell you why the background color of AutoCAD always changes with each release, but it does. You can change it back to black, or any color, very easily. Open your OPTIONS window (type in OP at the command line) and go to the DISPLAY tab.
Click on the COLORS button near the center on the left of the window. A new dialog box will come up. At the TOP on the LEFT, there will be a box called CONTEXT. Select the 2D MODEL SPACE option (it will highlight when you select it). Then, near the center of the window, on the INTERFACE ELEMENT, select the UNIFORM BACKGORUND option. Then, on the top right of the screen, there will be a COLOR option box. Click on the arrow to bring up a list of colors. Pick the one you want (I chose black).
That is how you switch your colors, for anything. Play with the options and see if you can come up with a color solution that works for you.
Happy CADDING.
