I love swap completely slowing down the process of reaching the threshold to trigger the OOM killer to be invoked (if at all, and hopefully not stuck in the limbo in-between), thrashing my NVMe or SSD with useless activity for several minutes into hours, to sit and watch a system be so dogged down, that you can't even log into a virtual tty without it timing out (all while the kernel is actually responsive to immediately respond to magic SysRq keycombos). It's great.