I wish i could explain myself so clearly and with few words as you...
This hobby is about " plurality" yes, (not universal perfection, with a universal recipe, and some universally good gear) because of the acoustic specificity of any content in a room , of any gear and of any particular ears... And it is about fun learning of acoustic or /and electronical design yes...
Music was fun all along....From my few bucks battery radio at 13 years old till my system/room now...
Thanks to say it so eloquently...
In other words, the challenge of upgrade-itis isn’t about material after all; it’s about a dogmatic and myopic idea -- that "perfection" is singular and final. If perfection is about plurality and change, the "disease" of audiophiles goes right away, with the hobby left intact.