Nothing is free. Running the NAM capture takes CPU just like the Fractal amp models do. Amp models run on a dedicated core currently so they contribute very little to the reported CPU usage now.
IIRC cliff said that there will be a separat CPU for NAM and stuff. My point is that I can think of capturing my ambient scene in highest quality and then e.g. get rid of the delay and plex block to free up the cpu for something else. Or capture the chorus/flanger/whatever scene and get rid of those blocks, or running 2 (or more) amp setup in an fm3 format.
I’m pretty sure we will find something useful to do with this tech.
