@romin
Why not? Nowadays SSDs somehow offset this problem, but it's still way faster than retrieving same files from slower storage, besides, I believe heat dissipation for RAM is more efficient than it is for storage in most systems.
And I would choose such a use any day over storing 50 open tabs, most of which can't get swapped out because some web dev decided to keep the audio device open or use a high-precision timer ๐