Comment Re:Hm. (Score 1) 179
You virtually always hit the noise limit before you get to the point where you have to worry about the fundamental discreteness of matter and energy. The majority of quantum experiments involve a lot of cooling and isolating of systems with very good reason!
However, due to the statistics, you can actually detect the effect of discrete electrons, without going to the level of single-electron measurements. But broadly speaking you're correct.