I think "audio nervosa" and the image of the audiophile as on an endless path of upgrades and expense is just a stereotype. Sure, there are those who fit the stereotype, but it’s no more than that.
Based on what I see, most people who own high-end audio equipment are actually somewhat reluctant to "upgrade." After all, their systems are already at a pretty high level of performance. For that reason, they also tend to be reluctant to embrace the latest technology. That’s why so many high-enders waited before they jumped on the CD bandwagon. It was obvious from the beginning that the technology was immature.
None of this means my audio system doesn’t slowly evolve over time. But it’s a gradual process and often driven by technology. Things like streaming and remote control preamps weren’t an option when I assembled my first high end system decades ago, for example.