Surprisingly, I still see them around in Berkeley. As a pedestrian they're a bit annoying underfoot but mostly harmless. As a potential customer, they're so slow and ineffective that I've never felt tempted to try them out. They're thoroughly dull even as a novelty.
Hmm, I don't live there anymore but have visited the university a few times lately. Haven't seen any Kiwi bots. Last time was this month, which is summer and not peak business there, but other times were during school.