I suppose veteran rewards are for that, though they're also meaningless glamour/ mounts/ etc. I think what melisande was getting at was the fact that in previous MMOs something like a relic weapon might have taken even longer to get, but would have lasting value. The way it's implemented in this game unless you quickly grind it out immediately it's either outdated or close to it by the time you get it, nevermind 6 months down the line.
In one of several efforts to make this game accessible to new players the devs neglected to make any items give a lasting advantage, and it's difficult to see how they could given the state of itemization. For a weapon to be useful one year from now it would have to be insanely powerful today -- objectively and significantly more powerful than anything else out there. Even so, 2 years form now it would be trash because all we really have to make weapons powerful are weapon damage and main stat and those things are constantly climbing.
To have items that can be useful even after new items have been introduced you need to slow down the power creep and add more interesting stats.
FFXI had a wonderful assortment of stats (IMO). One of the most sought after weapons in the game had very low damage, but due to other game mechanics and the unique properties of the item people still wanted it several years after release, even after level cap increases (referring to the kraken club in case you were wondering -- occasionally attacked 2-8 times). There's room for much more interesting stats that could make gear last longer if they'd also stop increasing main stat numbers so dramatically.
I'm not even advocating that they slow down on releasing gear really, just saying that it's not necessary for every other patch to include definite upgrades for every single slot on every single job. Of course, you really could get by with less gear added overall. I never quite understood the very rigid gear set structure that they use, but I suppose it's just another layer of accessibility (ie. as a tank everything 'of fending' is for me, and maybe some 'of slaying' stuff sometimes, and nothing else ever).