Which of the following is not an advantage of swapping pages to disk?

$1.)$It allows for over$-$subscription of physical memory.

$2.)$It allows for more processes to run than technically there is physical memory available to run them.

$3.)$It allows for code and data that is seldomly run to be unloaded from memory so that other, more active processes can run.

$4.)$It takes advantage of disk speeds to give memory accesses a performance boost.