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In Ultraforge (https://filterforge.com/ultraforge/), all nodes will snap to grid, and the nodes are designed in such a way that connections between then will automatically go along the grid lines -- this greatly reduces the clutter.

Could you explain, however, how could the grid make node graphs browsable by keyboard?

Let’s say your grid is 8x8, you could make a pointer that’s 16x16 and that you can move around with the arrow keys. When it touches a node, then the node is selected. But then you can hold ctrl to jump from one node to another, if they’re aligned.

Kind of like excel, how you browse multiple tables in the same grid.

I'd think that also helps in a lot of pointer-based editing use cases: Creation, selection, grouping/clustering, sorting, transforms...

Node-RED - nodered.org - has snap to grid but no auto alignment...