Joe, companies like Naim make expensive external PSU's and then...
1 - They claim that they improve performance.
2 - Reviewers try them out and agree with Naim.
3 - Punters buy them and they also agree that they work.
4 - People on fora ask how they work.
5 - Nobody on fora can answer.
6 - People get suspicious.
7 - People question whether they do anything at all.
8 - Owners defend their products - Saying that they do work.
10 - People ask them to explain how.
11 - They can't - They just say they do work.
12 - Fishies like Rob and Paul R explain why they don't work.
13 - Other fishies disagree - And call their fishie bretheren trolls.
14 - Sensible people investigate and find that the products are Foo.
15 - Owners get very defensive and factions are formed.
16 - Mods have to try to deal with the arguments.
17 - Owners start asking non-believers to prove that they don't work.
18 - Sensible people that have investigated explain that there is zero proof that they do work.
19 - Owners ask them how they can know that if they haven't heard them.
20 - Sensible people explain the power of suggestion.
21 - Owners call them trolls and explain that they trust their ears.
22 - Sensible people ask them to blind test.
23 - Owners don't ever do that.
24 - Sensible people ask - Why not?
25 - Owners don't need to, they say.
26 - Science is ignored.
27 - Myths are born.
28 - Bad advice is passed on by owners who are now heavily emotionally invested in their products.
29 - The truth is buried.
30 - Naim win.
31 - Punters lose.
31 - Sensible people give up.
32 - Or do they