The post was made in the news@lemmy.world community and other posts linking to the same news article were made in technology@lemmy.world and in askusa@discuss.online. 3 different posts in 3 different communities.

PieFed de-duplicates them and only shows the post once in the timeline and when viewing the post all the comments on those 3 posts are shown in one place.

The fragmentation problem is solved.

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[–] SorteKanin@feddit.dk 4 points 23 hours ago (2 children)

Hmm I guess some people might like this but I'd be a bit afraid of mixing different communities just because the same link is posted in them. Different communities might have different rules and different expectations for participation and such. This kind of mixes the different communities together.

Like imagine someone posts a link to an article to !nyheder@feddit.dk (Feddit.dk news community), which is already posted in !world@lemmy.world. If I understand correctly, I'd then see comments from both communities on the same page? But the comments on Feddit.dk will be in Danish and will probably largely be about how the news story affects Denmark, while the comments on lemmy.world will be in English and from a more international perspective. But muddling these things together takes away the "identity" of the community and suddenly you'll be seeing stuff you maybe won't want to see (i.e. danish comments for instance if you are not danish).

I think there at least should be a user preference to disable this, and an option for moderators to opt out of this, to avoid the above situation.

[–] ericdavidmorris@sh.itjust.works 4 points 22 hours ago (1 children)

But the comments are still separated out by community in the example post. You can still see the discussion in !technology@lemmy.world as a stand alone, isolated discussion, but if you scroll further you also get the !AskUSA@discuss.online. I assume if you reply to a comment, you’re then replying in that community, but I didn’t test that.

[–] MBM 1 points 1 hour ago

Lemmy shows links to all the posts about the same link (I think) so it doesn't feel like an improvement over that