I had been thinking about the same topic earlier, what I figure they'll do is release components every couple of years or so to scale the weapons upwards into a higher tier. Causing players to seek out very rare, hard to get materials that you take back to the guy who forges these current relics to upgrade them to a new tier. If you dont upgrade the weapon, they still remain powerful, but something else can surpass them from dungeons, etc. Eventually the level cap will increase, the most powerful weapons should not be level 50 weapons, whether they are Relic grade or not. Instead, as the level cap increases, components should be included in the game that will boost the weapons' own capabilities while also increasing its level to be used as well, every 5 levels or so (to stay in league with level increases) until the cap is hit. I stopped playing XI long before Magian and Emperyian weapons were released so I dont know much about them.