Scripts are products of their processes. For example, musical notation looks the way it does because it was created when people used quill and ink to create the notation. Scripts that we use for writing have their origins in hand-writing and printed wood/lead.

So it's also possible to flip this around. What script could be designed with its basis being a 3x3 grid? That would allow you to create forms which are maximally distinct from each other, without needing to conform to a script like Latin characters.