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This is a transistor. It controls current between the collector and the emitter. It's a fancy dimmer switch. There is nothing this device can do that you couldn't already do with a bunch of dimmer switches. No matter how fast they are or how much Bell Labs hypes them, it's just a dimmer switch.

"I am going to vastly improve weather prediction by wiring up a bunch of tiny fast dimmer switches" -- you think it's going to rain tomorrow because a dimmer switch told you that? Listen to yourself.