There are still some areas of TiddlyWiki that have not been fully developed beyond the experimental stage:
- Multiple users with the client-server configuration
- Smartphone user experience
- New tiddler manager, including bulk operations like search and replace
- Federation that can run in the browser or under Node.js
- Improved editions
- Improved support for third party plugin libraries
Also see the issues list on GitHub: https://github.com/Jermolene/TiddlyWiki5