It's a cargo cult and a bias I see all over the place.

I feel like we're now, what, 20, 25 years on and people still haven't adjusted themselves to the fact that the machines we have now are multicore, have boatloads of cache, or how that cache is shared (or not) between cores.

Nor is there apparently a real understanding of the difference between VSS and RSS.

Nor of the fact that modern machines are really really fast if you can keep stuff in cache. And so you really should be focused on how you can make that happen.