If you're used to centralised networks like Facebook, you may be wondering why Mastodon and the Fediverse are spread across thousands of sites. Why not just have a single site where people sign up?
There are many important reasons, but maybe the most important is this:
Networks on single sites tend to be bought by bad people when they get popular 😠
It happened to Instagram (bought by Facebook), it happened to Whatsapp (bought by Facebook), it happened to YouTube (bought by Google). It can happen to ANYTHING built entirely around one site.
No matter how much you trust the people who run a site, when someone offers them billions of dollars they may just take the money.
Decentralised networks, where there is no central site, are much more resistant to buyouts.
No one owns the global email network, thousands of indie players like @Tutanota and @protonmail are able to offer alternatives, and if one provider behaves badly you can switch to a different provider.
@luka Yes, both because caching is a good practise and because content gets places into ones "inbox".
Activitypub is actually not much different from mail when it comes to fundamental architecture.
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