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Discourse, the free forum platform, is now joining the Fediverse.
(mastodon.world)
This is a most excellent place for technology news and articles.
If they get cached then do edits never propagate to other servers?
No, edits propagate, they just get sent as updates, and it happens pretty quick I think.
But posts are about 1/100th of the traffic in forums in general, most people are just lurking. That's the traffic that slows down servers.