ATProto is an interesting technology but the Bluesky app itself is seriously flawed as a Twitter/X competitor.
Probably the worst feature is the "nuclear block" which allows a single user to completely disrupt a conversation: if one user blocks any other user in the thread, this removes the blocked user's replies for everyone else reading the thread, and severs the connection between posts so that even if you go directly to a post from the blocked user you can't see what post they were replying to or any of the rest of the thread above that.
There are partial workarounds to this with third-party websites that attempt to piece together the thread from various other API calls, but these aren't perfect and it's annoying to have to do this to understand the context of a conversation full of blocked posts.
It's not so bad. I managed to create a minimal implementation of a PDS for a Bluesky bot that can make simple text-based posts, and it only took a couple of days. Kind of lost interest in it after that but it was reasonably straightforward to iterate on. The trickiest bit was getting the subscribeRepos websocket to work, mostly because the documentation was unclear.
Probably the worst feature is the "nuclear block" which allows a single user to completely disrupt a conversation: if one user blocks any other user in the thread, this removes the blocked user's replies for everyone else reading the thread, and severs the connection between posts so that even if you go directly to a post from the blocked user you can't see what post they were replying to or any of the rest of the thread above that.
There are partial workarounds to this with third-party websites that attempt to piece together the thread from various other API calls, but these aren't perfect and it's annoying to have to do this to understand the context of a conversation full of blocked posts.