Whenever anything is "federated" the easiest comparison is email. Everyone can use different email servers and applications, but they can all still communicate with each other. "Email" is the shared protocol that structures how data is exchanged between servers and clients.
The fediverse instead uses a protocol named "activitypub", but works similar. Just a bunch of servers that speak the same technical language which enables them to freely exchange information. But while email only supports single messages, activitypub supports more complex structures that developers for platforms like lemmy or mastodon can use to make actual applications with an interface that gives you an easy way to display and structure that data like as a forum or blogging platform.
Literally everyone who uses email knows that not every email address ends in the same way and that people use different websites and tools to access their emails.
Nah this xkcd really doesnt apply here. If you can can see and have at least the intelligence of a 6 year old then you can see that something is different about email compared to whatsapp or signal. With even the most basic pattern recognition skills you will find that everyone you know uses different apps, sites and addresses. Compare this to normal messengers where literally everyone will have the exact same app, interface and way to contact people.
Maybe. I have no 6-year-olds around to ask. I have noticed that people often have misconceptions that I can't even fathom because I have grown up in a completely different tech environment. For me, it has not worked to make assumptions.
Its the only widely adopted digitally federated system that exists, where users are aware of the federation aspect. What could be a better technical comparison?