Nothing was really lost lost, the posts are still there in the database but toxic topics in the table kept them from forming right, if there is a critical post missing I can manually recover it, on first conversion it killed about 1K posts, I managed to wiggle it down to about ~500 or so, Trouble was sfc2net forums were neglected quite a bit, its hard to give it a good conversion when so much of it is toxic and hadnt been cleaned in forever, and the converter can only handel so much toxic stuff before it goes nuts...
but if you do notice a critical post missing let me know and Ill manually rebuild that post and get it recovered, It just too long of a process to do for all ~500 posts
Thankfully phpbb3 is far easier to maintain so we should be ok so long as it is not neglected for years and years and years.