But not your account, and not this community, and not the person you replied to, and not me, and not the other person who replied to you -> those are all 5 different things involving 5 different instances.

The centralization effect is really nowhere near as bad as it used to be.

But as always if we want something different, we have to create it. If there is content that you want to see hosted elsewhere, create a community to hold it!? Bonus: PieFed innately combines all comments across all cross-posts together, as well as combines several communities together into Topic/Feeds, both of which greatly helps the decentralization efforts by helping avoid smaller communities getting lost and ignored. Even if Lemmy were planning something similar, its pace of development moves forward so slowly that it might be literally years before you get one or both of those, but perhaps with it being seen to be so popular in PieFed the devs may choose to prioritize it more highly?

Anyway, Lemmy.World used to have >80% of all Threadiverse users on it, whereas now it is less than half of that, so progress is being made!

Another reminder to decentralize

Well, that is exactly the point of the fediverse. You don't have to have a lemmy.world account to see lemmy.world content. I am not even on lemmy but on piefed, and I see lemmy.world content perfectly fine without any server drag. Runs smooth and fast.