It’s cool to see this on HN. It’s a common activity in metabolic modeling & metabolic engineering circles to build new pathway visualization tools (I spent a chunk of my PhD on one called “Escher”). I keep waiting for a tool to come along that’s good enough to be sticky and win this little market. But it might be more like IDEs, where there are some classics (pathway tools = emacs?), and an endless supply of new entrants.