I find it annoying that one's latest purchase is by default better than anything else they've had. If I had a dime for every time I've sent a PM to someone after seeing a glowing review of their DAC or amp from 6 months earlier, only to find out they've changed it at least once or twice and what they have for THIS 6 month window is the greatest ever. Some people are addicted to the honeymoon phase, and the minute it wears off they go searching for their next fix.
That's a given. and I started an extensive thread on that very phenomenon some time ago:
Many of the guys at Audiokarma have got it far worse than most Head-Fiers, and some have just accepted that they like being able to setup a rig in each room of their house, swap preamps and speakers in and out etc. I dont have a problem with that, but you have hit it on the head when you say that each new gadget (particularly DACs ...) simply HAS to be the 'best eva'. I have had the same DAC for over 2 years now - God knows there have been plenty of temptations in that time - while some folk have burned through 4 or 5 in the same timeframe.