The top level comment is talking about Germany, which is not a common law jurisdiction.
Precedent by other court decisions is still relevant for law interpretation in Germany. BVG and BGH decisions are law-like. With a somewhat good argument any court decision can become a good template for a case.
The opposite is also interesting to observe: In common law countries the written law also becomes more and more fine grained limiting jurisdical law making.
It can be pretty subjective, but it often gets clarified with enough common law precedent (which can be amended with a new law if it becomes abused/unfair/odd).