Close, but not quite, since what's available (space in the specific example) isn't being filled. Alternatively, with the complaint that desktop software feels

Close, but not quite, since what's available (space in the specific example) isn't being filled. Alternatively, with the complaint that desktop software feels more sluggish on a modern computer than contemporaneous software did on much older hardware suggests that something is even being overfilled. My intuition says there's a different phenomenon of psychology at work here.