I simply disagree. I appreciate theory just fine, and use it daily. I just don't design power supplies down to the last millivolt unless I'm doing a reference voltage.
Based on an old QC datasheet which I still have, in 1975, I designed a 28 volt linear supply that was accurate within .0002 volts from 0 to 4 amps of load and power line voltage from 105 VAC RMS to 125 VAC RMS, but that's not competitive in the retail market and that's not what I teach to beginners. If you think .000714% accuracy across line and load is showing no appreciation for theory we will just have to agree to disagree.
What??? I thought you didnt need that level of perfection
I dont think either of you guys get the point yet. 0.0007 percent accuracy is not what this is about, it's about 0.000000000000000000000 percent accuracy. In fact, it is about no error at all. Why would we need such a thing? So we know when we have 0.0007 percent accuracy or 0.0008 percent accuracy, and all by calculation, which does not require a direct measurement of any kind.
Granted this is not easy to get sometimes, but when it is it is like pure magic.
If you can somehow find a way to reject this too, then you must reject all scientific work since year 1. That would be very unreasonable.