In practice, does anyone rely on cross-platform federation? I don't mean between Mastodon and other Mastodon-like software, or between Lemmy instances. Does any

In practice, does anyone rely on cross-platform federation? I don't mean between Mastodon and other Mastodon-like software, or between Lemmy instances. Does anyone see a benefit from PeerTube/Mastodon federation? Or Lemmy/Mastodon? Or PixelFed/Lemmy? I never really saw the advantage here, and having to create an account on each platform is not great either...