If you can separate something out into it's own completely independent and reusable module, you should always do so. Also if something can scale by adding concu

If you can separate something out into it's own completely independent and reusable module, you should always do so. Also if something can scale by adding concurrency, that is often a good strategy. For example in conferences where every participant is supposed to talk, you can divide them into groups, so many people can talk at the same time but in small groups.