Hi Welsper,
No, I wasn't stating my preference for a fixed time "after acquiring an item," I was pointing out to Taban the claim that "6 months" being plenty of time w/ a piece of gear wasn't true at all for many people; many players don't have a "new shiny" from the day of the patch release -> say, 5 - 6 months (next iLevel Patch Bump).
Ultimately, I can only speak for myself (and many of my JP and NA friends) in saying that the current pace of gear inflation is too accelerated for our tastes.
So much work is wasted (fights / dungeons being outdated so quickly), or if something gets to be too RNG-reliant (e.g., certain HA piece not dropping), I'm hearing more and more comments (and I feel the same way), that, "Meh, doesn't matter. Next (big) patch will invalidate the gear anyways. Whatever."
The general feeling of detachment from the rewards you're getting because of how fast Item Level / Vertical Progression is going isn't something I like in FF XIV at all.
I hope they change this.