[mirwa]

My understanding.

Rift sawing is optimising the cuts to get the best straightest grain on the face. No real standardised cutting process, its about optimising.

You can get riftsawn wood out of the quartersawn process, these sections albeit smaller, hence more expensive

The photo you supplied, I am guessing they are just trying to highlight the lack of good wood for a better way of saying (wasteful) in comparison to traditional quartersawn which is wasteful compared to flat sawn, all the wood is useful, but maybe for making pens, toothpicks and all sorts of wood products

Steve