Decisions shouldn’t become obsolete silently.
A decision gets made properly — the evidence gathered, the case written, the committee satisfied. Then a cost forecast is revised, a policy shifts, a trial fails. The new information is published. It just never finds its way back to the decision that depended on it.
Software solved a version of this long ago: change one component and the build system knows precisely what depends on it. Nothing does that for the decisions an institution has already made.