Oddly, I had brewed a Tripel for a 60 gallon wine barrel project at our club this past month and it pained me to rack it off at 1.012, when I knew it would likely finish a few points lower, if given time, but we had agreed on a date for the barrel fill and I had fully expected the beer to finish by a few days earlier - just goes to show you that the yeast tell you when they are done! There were enough really dry batches blended with it that even if it doesn't finish further, the batch will be fine. Years ago, I would have racked it to secondary and waited to take a hydrometer reading a week or so after that - and probably lamented that it had not finished!