The Signal Server repository hasn’t been updated since April 2020. There are a bunch of links about this here but I found this thread the most interesting.
To me, this is unforgivable behaviour. Signal always positioned themselves as “open source”, and the Server itself is under the best license for server software (AGPLv3 – which raises questions about the legality of this situation).
Signal’s whole approach to open source has constantly been underwhelming to say the least. Their budget-Apple attitude (secrecy, i.e. “we can never engage the community directly”, “we will never merge/accept PRs”, etc) has lead to its logical conclusion here, I guess. I have been somewhat of a “Signal apologist” thus far (I almost always defend them & I think a lot of criticism they get it very unfair) but yeah I’m over Signal now.
jami looks nice
Jami does look nice but personally I really like having partial sync. So that only recent data is on my mobile device and the majority of the data can be saved somewhere with more storage available. I think this could be added to Jami by adding per-device automatic deletion of old data and having one device serving as an archive (with the ability to resend messages to other devices if they scroll back or search) but this would be a huge feature and doesn’t really match the current architecture IIUC.
You could have a private server interacting with the Jami network, and connect all your devices to that server