Does it avoid the downsides of a matrix representation mentioned?

The article responds to another, noting that there's inherent tradeoffs.

ex. "with 100 nodes and 200 edges...If we use an adjacency matrix representation...we need a 100×100 matrix containing 200 ones and 9,800 zeros. If we instead use an edge list we need only 200 pairs of nodes."

(n.b. this flattens a lot of the interesting info in both articles into 'ah, matrix!" - open to that being true but it feels unlikely)