Gulyas K I have pretty much the same horsepower using PixInsight (64G RAM, 5 TB SSD storage) running on Ubuntu 24.04. I've monitored the system as PixInsight was stacking many subs. The system is CPU bound (all 16 CPUs run at 100%). Memory consumed maxed out once at 50GB.
Given my previous old laptop (old style HDD), I'll never be cheap again. It's not worth it.....