You missed the other two reasons. Most companies can provide you with all sorts of "scientific " proof in white papers and measurements but none of that means a hoot if you can't appreciate the difference. Have you tried any type of tweeks in your system? What is your system comprised of? We can't tell from your signature nor from your contributions to these forums. Maybe if we know what you are basing your opinions on, we can understand if it is real world experience or plain old skepticism.

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#1 Trinnov Altitude 32-8-16, 271, 8000XE, 7200SEHC, 7200.2, Seaton F18, JL Fathom F113, Revel w990's, Kef R7, ATI 528 Amp, JVC RS4100K, SI screen. Roon Nucleus+, Eno AG, Eno M link, 218.
#2 Mark Levinson No5105, Ayre VX8 and CX8, Vandersteen Treo CT, Preamp varies.
#3 Meridian Ellipse