Similarly moving on to a decent issue tracker, Jira’s support for Epic’s/stories/tasks/capabilities and its linking ability is a huge simplifier for long term planning.
Modern ticket system or issue tracker? Yes, absolutely. But Jira? Certainly not, considering Atlassian's business practices. A project like Linux deserves a system where they can maintain some control and it probably should be open source.
Yeah email is ancient and certainly terrible from a usability perspective if you're an outsider to the workflows, but at least it can't be shut off or taken away on a whim. Also it's universal and therefore accessible.
why would the backdoor do that? It would immediately expose itself because every ssh client on the planet warns about changed host keys when connecting.