This could also be the gateway into instance transference. If the instances are more in-sync, it will be easier to transfer either a user account or a community.

Indeed, does it not make sense in a fediverse where you can forward or change your account to another instance a community, be it called magazine or lemmy can change instance as well.

It would also be a protection.
Already now we are seeing some instances of lemmy's / magazines growing larger than others e.g. selfhosted on lemmy.world vs lemmy.ml

Image in a year time if the largest of the communities would suddenly drop out (database corruption, server takedown, admin issue) again all the knowledge / posts are again lost and difficult to recover.

Or does it already work that way and I'm still not really grasping this hole fediverse thing?

I'm personally ok with multiple technology instances. It was weird at first, but I think that is by design.

I do agree that user management needs a redesign. I have three fediverse usernames that I created because I was a noob and everytime it asked me to login I would get denied and create an account. This would be absolutely awful for the normies.

This is where IPFS might actually be useful. Also this might help fight the trolls.

Is this similar to the global DNS network? There would need to be a protocol to exchange and keep the list up to date

not sure that solution is a good one for this environment. I'm new but from what i've seen the concept of moderation is different and your solution is trying to engineer a reddit-like moderation design to an architecture that is fundamentally not reddit-like. Moderation here is at the instance level, not the community level.

I can't form an opinion right now.
If all similar communities appeared combined into a single community I'd still be likely to want to still filter out sources.
But at the same time sometimes a place to see them all together sounds appealing.
It seems that I want both, but probably what we have now is the most flexible, forcing less limitations.

How does that not defeat the entire purpose? You're suggesting one global 'sublemmy', as it were, with one global team of moderators. How is that in any way different or better than what we just left behind?

This would be excellent if done right. What I am curious about is, where this will be implemented? On the protocol level in activity pub or with each GUI (mastodon, pixelfed, lemmy, kbin etc) need to individually implemented it?