Notebooks are a nice thing, but as I wrote in the article, you can hardly expect the full profit from switching to kotlin in notebooks. What we usually want is to write some code in a regular project with full IDE support and then make some plots using current classes and compile class-path. In order to do it with notebook, you have to compile everything to jar and then load it into script.
Worksheet seems to be really nice alternative, since it is already aware of class-path and is working in a repl-like way. The problem is thay it currently is not possible to add plots and tables to the result. I was wandering if it is possible to have something like workspace-notebook hybrid.