Yeah on my current nvme linux systems, swap is just "the phase where the ongoing leak makes the system kind of sluggish, shortly before the oom killer goes to work". On 32GB, I ~never hit swap "legitimately".
The most useful thing honestly has been a memory usage applet in the task bar. Memory leaks usually have a very clean and visible signature that provides a few seconds of warning to hit alt-tab-tab-ctrl-c.
