Why amplifiers work effectively in ce configuration?
Because that turns out to be the best combination of high voltage gain, medium input impedance and medium output impedance. This allows multiple stages to be cascaded one after the other. Common base has too low an input impedance to be driven by a similar previous stage. Common collector has a voltage gain max of 1, so you could never get any gain out of CC stages alone. In real life, various configurations are used in various parts of the circuit. Perhaps a CC input for high input impedance, followed by a CE stage or two for voltage gain, followed by a CC stage for low output impedance. .
