The 58/1.4 is not an exceptional lens like the 125/2.5 APO.
It has no outstanding feature.
It has, however, an outstanding combination of nice features (size, weight, handling, corrections, close focus, sharpness, max aperture, resistance to flare, etc.), and that makes it desirable. The Zeiss 50/2 Milvus is significantly better, but it fails in the categories size & weight.