In a way it is ironic because in aeronautical engineering everything is well tested with backup systems when it comes to making the airframes, engines, and the

In a way it is ironic because in aeronautical engineering everything is well tested with backup systems when it comes to making the airframes, engines, and the entire airplane. Yet, they did not engineer their software system according to the same standards of residency which is a part of engineering often forgotten about by many. One of the great value-added of firms using open source software is indeed the integration testing of various software packages. Lightbend is one example, they do a full Scala stack https://www.lightbend.com/platform https://www.lightbend.com/platform Databricks for Spark, Cloudera and MapR for Spark/Hadoop, etc.