Big Medium manages sites with tens of thousands of pages.
How many pages can Big Medium manage?
Big Medium doesn't enforce a limit on the number of pages, and ultimately the answer depends on server considerations like available disk space.
Vague, I know. Maybe this will be more helpful:
The vast majority of Big Medium sites have a few hundred pages or less, but Big Medium does manage sites with tens of thousands of pages, and a single installation of Big Medium can manage hundreds of such sites. (One customer runs just under 30,000 websites with a single installation of Big Medium).
Big Medium also scales very well to high traffic. Big Medium does all of its work when you edit and update pages; it generates static html pages during this editing process, and then it gets out of the way to let the web server handle the page delivery. This means that a Big Medium-generated site can handle as much traffic as the web server itself.