There's not much of substance to this article. The world of electronics is a bigger place than turning a load full on or full off with a Mosfet. A couple exer

There's not much of substance to this article. The world of electronics is a bigger place than turning a load full on or full off with a Mosfet. A couple exercises if you want to see why having some BJT's around is handy: Try to find a Mosfet that turns on at 0.6 Vgs. Compare the leakage Ids leakage of a Mosfet to the Ice leakage of a comparable BJT. I also take issue with the idea that "all that extra stuff" is drawn in the Mosfet symbol for "no reason". The body diode alone is an important factor to consider EVERY time you use a Mosfet. When you read schematics every day, you're trained to recognize when diodes will forward conduct in your circuit and having that drawn in the Mosfet symbol helps you immediately see problems that would otherwise make it into your final circuit.