[kodroid]

Ha, I love that you mind went to that final analogy.

I think you have correctly identified the important difference between the kind of applications I have been writing (mobile applications, which are relatively small and often have a good chunk of both side-effectful code and biz logic) and what your doing, which does not sound like it would have much to gain by spitting into a core & shell.

I have not much to offer you, having not worked on code such as you describe.