Well, it's certainly not parametric CAD -- it's a drawing program that happens to be in 3D, with limited (and, I'm very glad to see, growing) ability to use history for some more structured creation. But the biggest limitation is that it's numerics are mediocre, and subtle -- everything is in float space, and it's very easy to get into a space where things just don't make sense, especially far from the origin. In a CAD tool I'd expect to be able to enforce constraints to resolve this ("these two points must match"); I've been able to do that somewhat with my plug-in when the precision is there but the error stack-up has been too high, but there's also cases where the precision just doesn't exist.
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Well, it's certainly not parametric CAD -- it's a drawing program that happens to be in 3D, with limited (and, I'm very glad to see, growing) ability to use history for some more structured creation. But the biggest limitation is that it's numerics are mediocre, and subtle -- everything is in float space, and it's very easy to get into a space where things just don't make sense, especially far from the origin. In a CAD tool I'd expect to be able to enforce constraints to resolve this ("these two points must match"); I've been able to do that somewhat with my plug-in when the precision is there but the error stack-up has been too high, but there's also cases where the precision just doesn't exist.