Anything can restrict traffic. SMTP has no lock-in and you can use your own domain, but Gmail could decide to send all your email to spam.
Anything can just start ignoring traffic and not showing content.
I remember when Google Talk used XMPP federation. Lots of people ran XMPP servers. Then Google turned off federation and only Google Talk users could chat with other Google Talk users.
Unlike email, Bluesky essentially has one service. There's no culture of openness there. It wouldn't be hard for them to decide that they'd become the single service in the future. 99% of users aren't going to leave for a different provider and they could simply black hole stuff from other providers.
I'm not saying they want to do that, but saying there's no lock-in is wrong at this point. Bluesky could shut down their ATProto entirely and just close if off and 99.9%+ of users wouldn't notice a thing.
Bluesky can only be considered open once there are many other home servers and the Bluesky home server isn't the vast majority of traffic. Let's say it's 2025 and Bluesky has 500M users and there are 10 other servers with 5,000-500,000 users. Let's say one of the alternatives seems like it might be a threat to Bluesky's business model. Bluesky simply stops sending its posts via ATProto and then users on those other servers need to migrate to Bluesky. Total lock-in. Now, if it's 2025 and Bluesky has 50M users, ATProtoX has 100M users, SkyNet has 200M users, SocialSky has 25M users, etc., then it's hard to lock someone in. Bluesky couldn't cut itself off from 85% of the network. Bluesky could cut itself off from 0.001% of the network.
Just because Bluesky is using the ATProto today doesn't mean they'll continue to. As long as Bluesky is essentially 100% of the content/users/etc., it's easy for them to pivot away from openness toward lock-in. It's only open if they can't cut others off and as long as they're the source of almost everything on the ATProto, they can always pivot away. Yes, with the ATProto you can move servers. That doesn't mean Bluesky will continue to use ATProto and have openness around posting/viewing content.
Anything can just start ignoring traffic and not showing content.
I remember when Google Talk used XMPP federation. Lots of people ran XMPP servers. Then Google turned off federation and only Google Talk users could chat with other Google Talk users.
Unlike email, Bluesky essentially has one service. There's no culture of openness there. It wouldn't be hard for them to decide that they'd become the single service in the future. 99% of users aren't going to leave for a different provider and they could simply black hole stuff from other providers.
I'm not saying they want to do that, but saying there's no lock-in is wrong at this point. Bluesky could shut down their ATProto entirely and just close if off and 99.9%+ of users wouldn't notice a thing.
Bluesky can only be considered open once there are many other home servers and the Bluesky home server isn't the vast majority of traffic. Let's say it's 2025 and Bluesky has 500M users and there are 10 other servers with 5,000-500,000 users. Let's say one of the alternatives seems like it might be a threat to Bluesky's business model. Bluesky simply stops sending its posts via ATProto and then users on those other servers need to migrate to Bluesky. Total lock-in. Now, if it's 2025 and Bluesky has 50M users, ATProtoX has 100M users, SkyNet has 200M users, SocialSky has 25M users, etc., then it's hard to lock someone in. Bluesky couldn't cut itself off from 85% of the network. Bluesky could cut itself off from 0.001% of the network.
Just because Bluesky is using the ATProto today doesn't mean they'll continue to. As long as Bluesky is essentially 100% of the content/users/etc., it's easy for them to pivot away from openness toward lock-in. It's only open if they can't cut others off and as long as they're the source of almost everything on the ATProto, they can always pivot away. Yes, with the ATProto you can move servers. That doesn't mean Bluesky will continue to use ATProto and have openness around posting/viewing content.