Threads also does some things right, design-wise:
1. Well.... Threads 😉
New Post creation is 100% built for it. Their feed isn't, however. Hard to know what is and what is not a thread. Bookmarking is also not really there, go figure.
2. Using the plus icon as an invite to follow new people. You could even go a step further an not show anything for the people you. Just the plus for unfollowed users and an exclamation icon for possible imposters.
3. Hints with profile pics
4. It's very clean and minimal
