These days I mostly apply it to passives. Especially small ones. 0201 are a pain to work with, liable to blow away if you look at them wrong. 0402s are better, but still easy to lose. But if I’m trying to keep size & weight down I tend to need the tiny parts, so it’s easier to design to use common values as much as possible and spend $30-40 for a reel of 10,000 of them. I doubt I’ll ever run out of 10kΩ resistors!