varinyc

If the game does go open, I hope it's on a repository.

I think it would be cool, seeing as "how to code this" is just replace x with y, the whole tut could be replaced and automated specifically targeting the changed code.
This could be turned into a plugin feature that's as simple as "click here to add and enable this mod" in the forum to launch a base client to add the changes in through an API.

If a user would like to learn the specific differences, they could reference the documentation overview of the changed code (via author, but boilerplate or automated with bikeshed) and implement them in themselves with a git-pulled base.

But lastly, that would save up the forum space, less on delete this copy that, but actual content on educating maybe the when where and why. Or at the very least, separates the two forms of information, so just looking at it doesn't feel like drowning.