It seems like the OS developer's opinion these days is that RAM is cheap, don't swap. In the old days people cared a lot about swap performance because RAM was so tight that you were virtually guaranteed to swap at some point. These days you get 16GB sticks in boxes of Crackerjacks so why would you ever swap?

Of course the trend of making notebooks thinner by ditching the SODIMM slots and soldering insufficient amounts of memory to the mobo may reverse this.