I like TST. We use it in our code (FP'ish Kotlin). But I also like stack traces, as they show me call-stack to the point the error happened. Something TST does

I like TST. We use it in our code (FP'ish Kotlin). But I also like stack traces, as they show me call-stack to the point the error happened. Something TST does not always show: different call-stacks can result in the same (or very similar) TST-stack.