Earlier quoted context omitted.
You can export and import certificate files across machines. I've done something like this in the past, and found little issue. I prefer this to something like Discord's centralized account & server system, although I know there should be better alternatives for achieving decentralization.
Right. The problem was is that the majority of my users were non-technical. So I was left with the choice of: 1) picking voip software that supports username/password authentication that they would be familiar with since virtually every other service on the internet works in a similar fashion vs 2) picking Mumble and trying to explain to them how to import/export their identity certificates for all their owned device…
Experienced this for the first time last year when I started my current job at a company that is still using lotus notes. I get that it's possibly more secure than username/password but dang is it annoying.