From what I have read, these are very obsolete systems that are useful primarily because of their long range and the fact they exist (the most useful weapon is the one you have).

Ukraine has been known to use these as part of SEAD/DEAD operations. You launch one of these easy-to-intercept missiles at a high-value target. Russia is then forced to engage with their air-defense assets, which reveals their location. Nearby stationed Ukrainian aircraft simultaneously launch HARM missiles which seek out the now active air defenses.