Which makes me realise that Aaronovich's "Rivers of London" is a lot smarter about "avatars" (though his are tied to rivers, not cities). Pretty much any river humans interact with can have one; sometimes they die or are reborn for various historically contingent reasons, but while the novels are focussed on London, there's no suggestion that London is the most special, unique city EVAR!*

He also manages to suggest how the Rivers have changed as the city has changed around them, which it doesn't sound like Jemsin does either?

* Well, Peter, the narrator, probably does believe this, but it's not incompatible with him recognising that magic can and does happen elsewhere.