NC1 2.0 Bottom End Knock, Engine Rebuild Options or Conversion?

I understand that it’s an odd thing to do from the factory, but many of these engines last for 100k miles without a rebuild. So if the problem really is the lack of tangs, how does a 10thou regrind make such a difference over buying a new crank on a car that won’t be ragged and will be over serviced?
It’s all academic really as the advice leads me to a no repair conclusion, just going to break it.