Disappointed with multi-processor usage on new i9 18-core Intel PC

I was expecting (hoping) for a better core distribution on a busy project like this with lots of plug-ins, happening automatically “under the hood” with a larger processor. I’ve read in some articles/forum threads that some of the multi-processing is set up specifically for FX channels, but maybe not for Group channels (?). I’m curious to hear about details like that within Nuendo’s architecture so that perhaps I can construct the project differently to utilize the processing power better.

Friends of mine who work in television talk about their “super sessions” with up to 24 episodes of a show’s season living in a single Pro Tools session. I don’t see how that would be possible with Nuendo if I’m already sitting at 50% CPU usage with a single 5-minute episode.