Might actually start using that, had a few processes on macOS 27 get into infinite loops and causing massive load, especially Safari PIDs. Being able to kill full trees, see children and look at the resources taken, might be useful. Shame that Activity Monitor is so bare in features and even takes a surprising amount of time to load.

On a related note, macOS 27 is an extremely buggy, unpredictable mess and you should feel annoyed when using it. Amazing how they can have such great hardware, ham strung by poor software QA and doubly so since this has been an issue on every Mac I have ever used going back to 2009. macOS occasionally gets a bug squashing pass, but just as fast as we get a Snow Leopard, an unstable Lion follows. Also, hotspot and WiFi generally are still utterly unreliable.