Earlier quoted context omitted.
>incremental compilation works Not for me. There are hot zones in my code that I dare not touch unless I want to trigger an extremely long recompile. This really sucks.
you might want to give sbt 1.0 a try, it features better incremental compilation support: https://developer.lightbend.com/blog/2017-04-18-sbt-1-0-road...
Thanks for the tip! Unfortunately I'm bolted into Play Framework, which does not seem to be compatible with SBT 1.0. :(