"Why does Thunderbird look so old?"a new blog post about Thunderbird's planned 2023 release, codenamed Supernova. Community contributions to Thunderbird kept the project alive, but a lack of centralized oversight "resulted in an inconsistent user interface without a coherent user experience" and led to long stretches where the app wasn't being updated at all. It's those employees who are currently defining Thunderbird's roadmap, working to help it shed its technical debt, and hoping to expand its user base with a new Android client based on the K-9 Mail app