Yes, I’d say there being 40 more common names in existence is enough to make it “kind of” uncommon. Certainly enough to explain why someone with a fairly small social group does not see it overlapping many times. I don’t contest that in a large group like LW (or a moderately large Facebook network) you would expect to see multiple Lukes, indeed that is the point of using usernames.
Yes, I’d say there being 40 more common names in existence is enough to make it “kind of” uncommon. Certainly enough to explain why someone with a fairly small social group does not see it overlapping many times. I don’t contest that in a large group like LW (or a moderately large Facebook network) you would expect to see multiple Lukes, indeed that is the point of using usernames.