Do nzbdav streams need a second Usenet provider?

The practical question is whether nzbdav benefits from a second provider on a different backbone when streaming Usenet content. In normal sabnzbd use, an extra provider can help because missing pieces from one provider may be available from another.

It is unclear from the item whether the same benefit matters during streaming, where playback happens immediately instead of after a full download. The source contains only the question, not a confirmed answer or test result.