I can’t help but notice most (all I’ve seen anyway) of the federated projects are hosted on GitHub. GitLab is also federated, but can be self hosted and has at least discussed it.
I am fully aware of my bias for GitLab over GitHub, but I still wonder why is those things? Is there a federated source hosting project?
Jira suffers from the problem that you can configure almost everything. Pouring that into an efficient data structure (in memory and in SQL) is almost impossible, so it always has to do tons of overhead.
I feel like ironically this freedom to adapt it to you needs makes it not only slow, but also unusable, because every bullshit business requirement gets some artefact in Jira. Even though 95% of the workflows look exactly the same in practice.