i think the "from the trenches" is a good format for a blog post somewhere, where growing outdated over time is expected. for this documentation however, we have to maintain all of it, so duplication makes it increasingly hard and we will have outdated parts in places people expect things to be up to date.

maybe you could publish the self-contained story-telling tutorial on your blog (or the symfony blog?) and we just keep a reduced part in the official documentation.