NSMS
Probably evil, unfortunately.
- Location
- A rapidly widening tear in the fabric of reality
'Not on an industrial scale' in response to 'using chakra to generate power would be inefficient compared to other methods' certainly suggests you were talking about industrial/large scale chakra-based electricity generation. I actually can't think of another interpretation that makes sense, tbh.??? You are misreading. Or I misspoke. I was absolutely suggesting it as a chakra control exercise. Take object, make it spin at a consistent rate. As all chakra control exercises, it has practical uses:
1) Circular saw-like weapons without engines (kienzan anyone?)
2) Rollerblades that could potentially stick to any surface
3) Generating electricity to power personal equipment, such as to electrify wires without the need to use chakra for that (potentially useful against sensors, might not share same limitations / weaknesses as lightning release)
4) Potentially boosts to taijutsu (basically, twist and pull your enemy's flesh with every strike).
As for its use purely as an exercise... I can see arguments for and against each point, to tell the truth, so I'm staying out of that one.