I've seen four live demos, the two from the Sydney (Aust) reseller as well as two from the Launch event in Boston.
As you attended your event you would have seen the motorhome used. I was the supplier of that model.
I have yet to see a crash at a live event.
I have been running SOLIDWORKS 2018 since Beta in July. I've seen very little crashes. The ones I have seen have been related to features that did not make the final release. Those were to do Large Design Review, Mating Graphic components and reverting components back to Graphics. The reason why they didn't make the release.
I have been running Beta on a very non-CAD HP Spectre