Apart from the hijackers: thank you very much guys!

The linked PDF book is a very good read, I like that! Must read more.

I understand for now, that such an OpAmp is a very flexible signal amplifier and in terms of "manufacturing tolerance" and reliability and signal quality to prefer, instead of simple BJTs.
But what I don't understand is: can they drive loads? Are they suitable for "the power stage" of a project? It doesn't seem so. I would be interested, if someone could point me to a part what I would then call an "OpAmp Driver", that can handle bigger loads.
(Maybe that's why I never saw a use for them in any of my projects so far, because I understand 'amplification' as being able to 'amplify voltage AND current'. [A MOSFET with 1.4mΩ Rdson is not even slightly impressed, when there's a current of 5A or so ... would an OpAmp be?])
However, you guys helped me a lot! Thanks!
