Dynamic gas hits, gas grenades and artillery sounds at the edge of the map are not interesting, in fact they become annoying very quick and don't add to (they worsen) the quiet Apocalypse experience that characterized the game until they were added in 1.14. They are too prevalent/frequent, which makes them to play a huge part in any play through.
In the other hand, Static gas zones are interesting to have as an endgame contaminated area with unique loot.
Maybe I love this game too much and for too long.