dimensions in 3d losing association.. Annoying

I find this really annoying that if you dimension a 3d model and go back and modify the solid you lose association.

I run across this mostly when I use the "Modify Solid Entity" tool 

Taper face, cut solids by curves...

I can understand certain modification that would cut a face of chamfer but not all dimensions should be lost

So when you modify a solid in some fashion does it totally replace the geometry? That's the only reason I can see this happening.

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