[yanderekko]

Yeah, ultimately I think Reddit is structurally much more likely to lend itself to echo chambers because its community-based nature (organized around subreddits) gives it centralized targets of partisan attack: You can effectively disrupt speech not by actioning individual users at the account level but by just banning or heavily censoring subreddits where the disfavored speech is taking place.

This is of course largely what has happened, where subs with substantial right-of-center populations have been either banned (usually under the pretext of not being aggressive enough about policing for ever-evolving standards of "hate speech") or just co-opted by moderators who punish right-of-center speech in various ways (often indirectly, such as simply banning users who upset others by expressing disfavored views for the sake of community harmony.) Twitter cannot be co-opted in this way, really.

That said, it hadn't occurred to me that some people are so hostile to right-of-center perspectives that they would consider this censorship to result in a net reduction in "echo chambers", because presumably these perspectives are all so horrible that surely they can only exist in toxic, tightly-controlled spaces such as a Flat Earther community, etc.

[vkou]

Moderators punishing the wrong speech is precisely how I'd describe r/conservative.

[yanderekko]

/r/conservative is an odd example because I'm pretty sure everyone knows that the subreddit would be completely overrun by left-wing voices if they didn't enforce guardrails on this. At some point when tribal hatred becomes become sufficiently hot and lopsided in power, then the minority has no choice but to either leave or establish echo chambers. That describes the /r/conservative case imo.

In any case, I'm fully open to the idea that there are still right-wing echo chambers on Reddit. But the whataboutism is a weak distraction. The number of neutral spaces where people are allowed to effectively and openly disagree on hot-button policy issues has declined precipitously since the mid-2010s. Prominent powermods openly dictate what sort of opinions are "allowed" on various issues, and of course these boundaries are far to the left of the actual Overton Window of the populations whose democratic processes actually create policies.