The problem with that perspective is that as markets shift over time, what was once the perifery will soon be the core. That will put the open-source solutions

The problem with that perspective is that as markets shift over time, what was once the perifery will soon be the core. That will put the open-source solutions that can handle it in a very good spot long term, as these are exactly the kind of systems that don't end up with big rewrites of their data layer.