Okay, okay. Yes, there are situations where using a smith machine would be a smart idea such as some rehabilitation applications involving partial ranges of motion, trying to overload specific ranges of motion, etc.
Only if you reach the boundary will the boundary recede before you. And if you don't, if you confine your efforts, the boundary will shrink to accommodate itself to your efforts. And you can only expand your capacities by working to the very limit.
- Hugh Nibley