[kazinator]

But when you do that, you are still holding the tube circuit as the reference model. And what you built is more complicated; it has components that have no counterpart in the tube circuit. (In the digital case, you have hundreds of millions of tiny transistors, which are switching full on or off.)

[labcomputer]

Yea, but so what? It's cheaper and easier and you get the same effect, without all the downsides of tubes, like heat, warmup time and wasted energy.