Now, not sure what I was hoping for. None of my messages currently go through Meta and I'm quite happy with this.

As an implementer, I certainly wouldn't want to police and track my users and their location for a chat service, and as a user I wouldn't want a chat service to track me.

I also certainly don't want to depend on a system which is unreliable because it artificially depends on my or my contacts position on Earth

This whole thing sounds like something I will not want to use anyway.