Yeh no doubt. I'm going to learn them one at a time. Widow mines are pretty damn op especially in tvt or tvz, not too strong against protoss though
Protoss just has the luxury of being able to put cannons in their mineral line. Since they are detectors and attack land/air,they can essentially shut down drops whether it be marines or widow mines.
But the mines can still be successful against their army, you just need detection yourself to snipe their observer and then they have to either eat the mines or pull back until they get another observer.