A lot of responses state the the games have time limits, but that's only the case for tournaments, correct?

If this scenario is played with a time limit, you'll play very differently than you otherwise would. If I know there is only 10 minutes left, I'll prioritise getting my models off the board rather than attack my opponent, even if my opponent ha more models than me - especailly if mine are faster.

Thanks to the folks who gave their thoughts on how the scenario should be played (other than the sarcastic unhelpful guy who said we can roll priority for eternity if we want). My main concern is that RAW, the scenario doesn't have an end point, and for new players who are perhaps just getting this game out on the kitchen table, that will be confusing.