Mumble is like a reliable Toyota Corolla. You will turn no heads, but it has all the features you would need for the task (encryption, room hierachies, ACL, machine-learning-enhanced noise canceling, positional audio, choice of method input like push-to-talk, mini UI overlay atop games), and does them efficiently.

…And like a Toyota Corolla, there’s probably a decent upgrade out there, but you might be compromising on more than you think. Want a car without the manufacturer tracking you or bloated, touch-screen navigation? Many ‘modern’ VoIP options, especially proprietary ones, are literally doing the latter.

mumble is pretty good. I've been using it for a few years, has great client server support, no bullshit on either side of the fence there. Super minimal client, though my linux client has issues with leaking memory, easy enough fix though, kill it and restart, which takes 2 seconds.

has pretty good bot support, you really can't ask for much more, a bit more support and community utilization would be nice though, it's somewhat dead.

So far mumble has been the definition of "just works"