If I understand you correctly, you're using threads instead of scatter/gather processing?

I don't really see where exactly the gain would be, is the programming simpler, or maybe the setup?

However, I find this statement to be really strange: Any large structure(s) of data where different subsections can be worked on independantly, but the results must be fed back to the main process would benefit from threads. This is perfect application for workers pool model, why do you believe threads fit here?

If there would be really large structure, something like gigabytes-worth-of-data, that need to be edited in place, and can be edited by multiple workers, that would be perfect application for threads.