With reddit we mostly had a single subreddit for a given topic, for the sake of the question let’s use gaming. If there were alternative subreddits dedicated to the same topic, they had names that gave that away. Do you think Lemmy will lead to more segmentation, and more information bubbles seeing as we now can have gaming@x and gaming@y without a obvious way to see which community is the “default” one? Will it be a good thing, as you can find a community that suits your preferences better, or will it stifle discussion?
Big thing is to first search ALL communities (not just in local instance) before creating a new ‘subreddit’. Some appear to be linked (like Tech groups) because when I posted I saw a note about it being cross-posted.
But certainly from Beehaw, I saw the various Lemmy communities listed, and I did a join from there (says subscription pending still). This would cut down on segmentation / fragmentation.