Hi Cédrick - in hindsight, yes: it would have been worth it to use an actual graph database for this project. The cost wasn't the technology itself, but the cost of deployment, hosting, and instrumentation - and at the time, the PaaS we were using had less-than-stellar support for actual graph databases. The reasons we chose to implement the graph ourselves were flawed - and the whole reason I wanted to share :) Thanks!
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