all these systems can be defeated by detonation of ordnance on target, they need multiple systems and backups so another can be brought on line when one is blown up.
The Russians figured that out a while back. Both the S300 and S400 (among their other systems) are datalink-capable - properly sited, you have to take out multiple radars and launchers to get any sort of hole in air defenses as the network simply compensates for problems like that now. Such a system can also function as a virtual large array system and localize stealth aircraft well enough to warn the operator that there’s one operating in the area and vector AAA fire into the area, though not well enough to establish or maintain radar missile lock.
The S300’s issue (at least on the export grade systems) seems to be that it can’t see anything moving at 500 feet or less, which is how Israel got away with some of their prior strikes on Syria and other places with the S300 system. Supposedly the S400 radar solves this problem.
Yeah that the MALD system I think it is called - but the USAF may not have purchaced or deployed it - lot of budget going to F-35s ...
US Air force unveils S-400 KILLER MISSILES to scare Putin
https://www.youtube.com/watch?v=A85Czh9KexI.