Another #MastodonTip I've learned is that if you're posting a long thread then make the first one public (with the 🌍Public: Post to public timelines) but make the rest of them unlisted (with the 🔓Unlisted: Do not show in public timelines) which means the replies don't appear on people's timelines but the first post does! ☺️
However if you're replying to an unlisted post and you *do* want your reply to appear on the public timeline then you can set it back to 🌍 Public.