IMO the signal matrix bridge solves this problem. It does not do video calls to my knowledge, but it does let me have all my signal messages on all my devices, with no limitations.

I swiped

Hackberrypi CM version looks great

I’m writing documentation in obsidian. I then expose it to the web so I can access from all my devices and share to others with quartz. Everything is markdown. It’s tunneled out of my network with cloudflare tunnels, which do handle SSL for me.

This is really cool! Do you know of any existing tools doing similar stuff to this ?