PvT Hallucination against Mech
PvT Corsairs with Disruption Web and Dragoons against Sieged Siege Tanks.
PvZ Dark Archons and mass Maelstrom with Archons against Ultralisks.
PvZ Arbiters stasis against Ultralisks.
I've seen old games using these strategies. But I wonder if they would work 10 years later in 2017? Like Maelstroming Ultralisks, could Bisu use it against Jaedong?