I’ve actually been running Fizzy on my own Cloudron instance continuously since the start of this forum thread.
The project has seen a lot of updates since then and is being actively pushed forward. So far I haven’t had any issues keeping my fork in sync with the latest releases, and the recent versions have been stable for me in day-to-day use.
If anyone wants to try it out themselves, you can install it on your own Cloudron instance via the Cloudron CLI with:
cloudron install --image pathab/fizzy-cloudron:latest
So from a packager’s perspective, it’s been very workable and maintainable.