[bashkiddie]

I do not understand why your comment got downvoted:

I do receive spam in Signal, because i had to register a phone number.

I loose my chat history if I do not log into the desktop client for FIXNUM days.

The desktop client may crash as soon as you kill its supporting terminal.

I have tried the user name feature once and signal reported, that they had lost my username, I would need to create a new one.

I have not tried backup and restore. So far I am not in the mood for a potential failure.