To me this fragmentation is one of the strongest suits. Instead of putting everyone who is interesting in technology together, (which is an very large group of people), you can subdivide people. Take AI/LLMs for example. There's a group of people who is really interested by them and tries to use these technologies as much as possible. Theres also a group of people who is very critical of the harms and negative side effects of LLMs. Instead of mashing them together in a single community, both can now discuss the same news from their own standpoint.
And no, I'm not concerned about filter bubbles. I think the problem is the opposite, the idea that we have to force people in the same space who do not want to be together in the same space. Just like we dont do that in real life, people should gather around with the people they want to be with.