Complete tangent, but I met my equally nerdy brother in Paris last month.
It was my first time, and his fourth. We stayed South of the Republique metro station.
After the literal 30th indie Manga [0] shop that we walked by, I asked him: "how are all these shops financially viable?" He said: "look inside."
Holy crap, they all had customers inside! I had no idea that Japanese culture has such a strong presence in the heart of Paris, in the middle of Europe.
[0] I should be clear, this was not just Manga. There were so many cool indie retro video game shops that it blew my little mind. I should probably get out of my Silesian village more often.
france has a really strong tradition of comics, it's not just manga
Pedestrianization of neighborhoods like Rivoli did decrease shopping at first, but ended up exploding again once people got used to it.