I suppose this would depend on how they implemented it. It was apparently feasible enough that they offered it as a stretch goal. I believe what they promised at the time was an implementation of the Box2D physics engine if the stretch goal was met. The stretch goal was met, but the physics engine was kicked to the bottom of the roadmap for a couple years before it dropped off completely.
It's clear that this is not important at all to anybody in this forum and maybe even the LiveCode community at large, but they did collect money specifically for this feature, and then failed to deliver it or even mention it ever again as far as I can tell. I don't think I'm wrong to feel that this should have at least been addressed specifically in an update or blog post as opposed to being quietly dumped with no explanation. This is one of my very few gripes with LiveCode, and as I've already said, I'm quite happy with what we have now. I really don't have anything else to say on the topic. As far as I'm concerned, the community has spoken, and they don't care about 2D physics.
In regards to the original intent of this thread, I will reiterate that I love LiveCode and think/hope it will be around for a long time.