That works well if your brain is specialized correctly to actually keep track of all this. During my undergraduate, I personally was semi-regularly accosted by

That works well if your brain is specialized correctly to actually keep track of all this. During my undergraduate, I personally was semi-regularly accosted by strangers who knew me and, only after at least half a minute's conversation, I finally recognized as not-strangers. I don't handle people well (but computers are far easier to debug), so the more of it I can offload externally so that I can focus my brain on what really matters, the better. Comparative advantage.