i recall that there was a reputable cable maker some time ago (don’t remember who now) who argued that shielding rca i-c’s could hurt the sound a little, but even then that maker admitted that there are many times/places/systems that need the benefits of proper shielding (usually in the context of truly minute phono signals and their connections), which outweighed the minor sonic decrement
i have some unshielded ic’s and but most i have are shielded - and i don’t have the same ic that is constructed with and without shielding as the only difference, so i can’t really say if it helps
and i like others here, have always use shielded connections for analog