That's fair - comparing calls to texts is not apples to apples. But I think the issue is deeper than live vs async: voicemail is fully asynchronous, and it is by far the least popular of the three.

I don't think your objection diminishes my main argument, which is that many forms of communication don't receive any optimization from VR - including forms that the VR crowd seems to believe will be revolutionized (e.g. wildermuthn's whiteboard example).