I guess there is a trend to consider, in which algebra and statistics tend to be picked and studied more in the last decade compared to e.g. analysis. Thus why

I guess there is a trend to consider, in which algebra and statistics tend to be picked and studied more in the last decade compared to e.g. analysis. Thus why we don't see all that many people studying advanced analysis books. I would also argue that each country / culture teaches mathematics in a different way, which may not suit well with an outsider. From my experience US/UK tend to emphasize intuition first and rigor later, while French mainly focus on rigorous reasoning and proofs, leaving intuition as a by-product of experience that will be eventually picked up by the student on his own. That may discourage non-French students to further read such books.