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Pretty much in the title. Maybe you wouldn't even use it, but would like to simply see it exist for the sake of having a federated alternative.
For me, it'd be the following:
- Meetup
- Tiktok
I am on the first two, but would prefer a federated alternative. I'm not on Tiktok, but would like to see a federated alternative.
I'll admit these might not be a good idea. But as a thought experiment, I'd be curious about the community weigh in on what you all think this might look like.
It's entirely technically possible. Apps already use third party identity providers all the time, you just need federated apps to support OAuth both for signing in on the client and as a backend identity provider, and standardize how federated apps return user info that would be common to any federated app (usernames, saved / liked posts, subscribed feeds, stuff common to the ActivityPub spec).
You could use the same credentials to open a new account on another instance, sure, I guess. You still have to create another user on the new platform with their own ActivityPub inbox and so on.
I guess to a non-technical user that might seem like the same thing, but then again so would your home instance allowing you to view other platforms. The second one would be way cleaner and easier on instance maintainers.