Conway’s Law gets quoted as trivia. In practice it’s closer to a physical constraint: your system will end up shaped like the communication structure of the team that built it, whether or not anyone planned it that way.
I’ve seen this play out the same way twice — a clean service boundary on the whiteboard turns into a tangle of cross-team calls within two quarters, because the org chart never matched the diagram. The fix wasn’t more documentation. It was reorganizing the teams to own what the architecture needed them to own.
If the system and the org keep drifting apart, the org is usually the one that has to move.