Cathedral-style coding isn’t very Open-Source

Cathedral vs bazaar is about development process, nothing to do with source code availability.

Nah, git has a bad command line UX. Which is why the developers are working to make it better, i.e. moving from checkout to switch.

Not that I know of, but here are some between Lemmy and Mastodon:

• Upvotes in Lemmy don’t translate to favorites in Mastodon
• From the Mastodon side communities are normal accounts that boost published posts.
• From Mastodon Lemmy’s posts are top-level messages (i.e. not a response), and comments are responses to the original message.
• You can post to a Lemmy community from Mastodon by publishing a post and tagging the community (@community_name@server.tld)