[opan]

>do you remember acquaintances from a few years ago who you haven't seen since?

This is tricky, because the first couple people I think of are people who sort of "exist" in some sense online. Maybe I haven't seen them physically in 5-10 years, but I see their handle on a friends list or maybe I've messaged them in that time. I can remember things from back when I did see them in person, but perhaps their presence in some form since then has kept things more active. (Maybe they're more friends than acquaintances, admittedly it's hard for me to draw a line there without a clear definition)

I'm leaning toward "yes", though. I can remember old people who I fixed computers for once or twice and never really talked to again otherwise. They weren't related to me or anything, it was purely business, but I can remember things like them offering me a drink or asking certain questions or that they pronounced a word in an unusual way.