Hi @lemouth. Processes or tasks can be in one state at a time, the detail lies in what happens behind the scenes.
In the architecture of the processor, several modules must work, activate, deactivate, store, etc. Then, the performance and associated cost is increasing, as tasks are running in parallel, which is the norm nowadays.
That is, we have multiprocessing and tasks running simultaneously on different processor cores, which consumes energy, time, and resources. Thank you for establishing this communication.