For PPRuNe purposes, we might be better off addressing the influence on air operations, air travel, and the airspace in the region as matters of interest to the intended audience.
Russians are now deploying S400 in Lattakia.
I wouldn't want to fly anywhere near trigger-happy russkies behind a long range SAM. Even if they don't have intention to shoot down civilian aircraft those systems are still not well tested and known to lock on wrong targets. See what happened with that Siberia flight when Ukrainians fired an older S200 rocket...