Largely inspired by A cool hack for drawing dividing lines in spaces, I’ve created this potential template for a 2×2 matrix. You can use this for a lot of things: one of those gartner magic quadrant slides, prioritizing features and ideas. Lots of design thinking exercises use a simple matrix, too.
I feel like using the cards and connections for the lines is the most flexible since you can easily change the size of the grid or even add more rows and columns. Here it is: