My disinterest in 4.0 relic grind wasn't only due to not having interest in the content, but also due to reward vs time spent. It just wasn't worth it to me, plus I wanted to try a new way of grinding out a BiS weapon. But the saddest thing to me is the fact that you cannot progress the relic whilst during normal activities such as running dungeons, trials, raids, roulettes, crafting, and all other methods previously made available in the earlier expansions. It makes me worry about those who wish to pursue a 4.0 relic, or want to finish theirs off when 5.0 comes out. If Eureka dies, so does the relic. And I'd feel quite safe wagering that this was a massive oversight from the dev team.

Then there is the matter of relics are essentially glamour, and there are other ways to obtain glowy weapons that are very relic-like. Some even better than the relics themselves depending on what kind of glow and weapon design you prefer. If the 4.0 relic was not locked behind Eureka, but instead you can run Eureka as an optional means to progress it, I feel that would have been a much better decision while also incentivizing this content.

I hope the devs learned from this going into 5.0, because this decision was indeed a poor one.