Quote Originally Posted by kykmorph View Post
Also, that 'future patches' is probably quite a long ways out. And they will have to do something to keep Eureka relevant and its player population from dropping precipitously as people finish. As a level 20, there's no incentive for me to actively spawn NMs or kill mobs. You just afk in town, and wait for fates to pop, then tag them for crystals.
Whether you're done or not at lvl 20 is up to you. Some players only want to get to 20, some only want the weapon, some are more interested in lockbox and fate loot than anemos gear, others want all gear regardless of value on their main and completionists want anything they can get. SE decide the requirements to access the next tier, but the players themselves decide when they're done with Eureka.

Also nothing suggests that what we have access to now will be entirely obsolete in the next tier. The tooltip for Anemos Crystals say they're aspected to wind. This suggests that others like it aspected to other elements will be available in the future. We may need crystals from several elements for future rewards. If that is the case that would keep the current tier of Eureka relevant potentially to the final step of the relic.