Also take into account that certain design features in many products are simply for user-friendliness, or to cover the producer's ass in case of warranty claims.
Knowledgeable and competent individuals don't need these systems, and sometimes removing them makes sense. Input coupling caps jump to mind as a prominent example. If your source is well-designed enough not to throw off huge DC offset, or if you are careful to make sure your gear is biased properly, you usually don't need input coupling caps, and you get sonic benefits from removing them.
I didn't learn any of this until I came to HC. I just knew that "moar blackgates = better". I'm sure there are plenty more wonderful little factoids that luvdunhill will caustically slide my way as time goes on.