[chopraaa]

I've faced this issue as well.

I run a Python script after the build has completed that reads the entire sitemap and chunks it into parts of 50k.

+1 for mentioning incremental builds as well. These two features are often overlooked and people just ask "why do you even have so many pages?" and it ends there because nobody wants to entertain the power user.

A third disadvantage I've seen is search. I use fuse to generate a JSON for client side search but it takes a lot of memory to render and is a cause for concern.