As in purple throw? A lot of it has to do with Throw Reject Miss. TRM state actually kicks in super early if you input a throw when a throw actually can't come out (like blockstun) compared to a whiffed throw. This also includes people that hide their throw tech during barrier. Which is why you'll see Ragna and Relius go for 5A whiff into throw. Purple throw, you'll see people get it off of things like Izayoi 2A or Jin 5B (5B > throw gatling was removed in CF however). When you see high level play and a TRM goes off, a lot of it is because they'll notice the barrier flash due to the barrier tech OS and pick up on player tendencies.
