If by algorithms you mean things like GPT, all data on the fediverse is effectively public and arguably even easier to be collected than the likes of reddit, and is almost definitely going to be used to train models whenever or not the fediverse federates with threads.
There's still significance in defederating though, specially when it comes to preventing "Embrace, extend, and extinguish"
etrotta
joined 1 year ago
That is already possible on kbin (browse to kbin.social/d/instance then block there, e.g. https://kbin.social/d/vlemmy.net ), I don't think that it is supported on Lemmy though.
(Mentioning since this discussion is on kbin, though it seems like you are using lemmy. rip)
Still way better than nothing at all
Their arguments still hold up pretty well as far as I can tell. If anything "improved" since then, you could argue that what the biggest platforms decided to use (Mastodon, Lemmy) became the de-facto dialect in use, but you still have to explicitly refer to how certain projects do things if you want to implement ActivityPub, which can be pretty demotivating for developers, and doesn't makes the user experience any better.
...and nothing prevents new apps such as Threads from using ActivityPub differently, being incompatible with existing apps and further dividing the space