XF 2.0 At what point is a Big Board Importer helpful?

Floyd R Turbo

Well-known member
I surfed a bit through https://xenforo.com/community/resources/vbulletin-big-board-importer-vbulletin-3-vbulletin-4.1981/ and a few other threads but couldn't really find an answer to my question.

At what point does it make sense to use a Big Board Importer?

Specifically, I am spearheading in import of a vB 4.2.3 site into either XF 1.5.x or 2.0. Actually both, then a decision will be made about what path to go down after a bit of evaluation.

The board has 1.5M posts, 136K threads, 98K users, and pretty minimal addons (I believe) and default style.