Thats what id rather avoid, just because its retarded.
Besides, why the would he need a DoD cloud computing grant to implement a weight calculation.
Be careful, you're still abrasive.
Bricks' not saying he's against physics is a bad idea, but a harsh one. There were lots of topics discussing a reasonable 3D cave-in model. There are several drawbacks. First, even just an acceptable model would still take a lot of time and work. Second, if it was badly done or thought, it would end up being more of a hassle than of a feature.
And the reason why it would need a few resoiurces is, well, we're talking about DF.
Even not considering sheer resistance and elasticity of materials, weight doesn't spread in a perfectly vertical way. So, for a column spanning over many Z-levels, you'd have to track every support for that column : are all horizontal branches starting from the column supports ? Would they break under their own weight ? In case the column breaks, what's going to happen to the ceiling ? How big would the cratter be ?
Do a search, these topics were quite interesting.
As for my part, I dream of adventurer skills and more lively dwarves. Especially the second one. Having them only purchase things they like and store them in their room would be a good start, considering the possibilities it raises (theft, life goal, fighting over inheritance, ...)