I don't think it's essential. I think it can be a reasonable choice, but there are other patterns that can accomplish the same thing, with some upsides and some

I don't think it's essential. I think it can be a reasonable choice, but there are other patterns that can accomplish the same thing, with some upsides and some downsides: https://gist.github.com/oconnor663/b0b32f25301ed5a1af4d07053edf7036 https://gist.github.com/oconnor663/b0b32f25301ed5a1af4d07053...