What's next for Bluesky? We're working on some of your most requested features:
DMs, video, improved Custom Feeds, better anti-harassment features, and a new login tool called "OAuth"
Check out the roadmap here: bsky.social/about/blog/0...
Off because there will likely be some bug that crops up in the future that temporarily defaults everyone to the default, and Off both highlights the bug when it happens and keeps people that have it off for safety reasons safe.