Streaming analyitics as default
Since La1r is applying a Kappa architecture (see conceptual setup for more details on this), it is essential that as many of it's processes occur in a streaming fasion. This also includes all the performed analytics. Streaming analytics brings new considerations, such as messaging ordering and quality of prefix data. Since these concepts are handled out-of-the-box (OOTB) in Spark 2.x, Spark 2.x is considered as the default method of applying streaming analytics.