This is a part of the reason I don’t like block references (as being described here). On one hand I really like the idea of using a quote or idea and pointing back to the original source. And it’s incredibly powerful for that link to be bidirectional, so the source can point to all of its references. But if that source changes, then everywhere it’s referenced changes and context can be easily lost.
So the referenced blocks would have to be immutable. If you want to change the source, you would have to create a revision. This way you can reference a particular version of a concept or quote and also see how it changed over time and not lose any context in the references. This is also incredibly powerful.
How any of this relates to what Obsidian should or should not be doing in terms of block referencing, I’m not sure. I think I ended up accidentally channelling Ted Nelson for a minute there 