They're kind of right. They work differently from what you're probably used to from older/different systems. They don't run into a brick wall when swapping, i

They're kind of right. They work differently from what you're probably used to from older/different systems. They don't run into a brick wall when swapping, in fact they swap all the time (very heavily; a lot of a running Application can be swapped-out on normal use). You're never really "out of RAM", you're just increasing memory pressure which gradually impacts the system's responsiveness. Though I might add is that at some point they do fail catastrophically (extreme lag sometimes leading to crashes) once the pressure goes into the red.