It's far from optimal for deployment, though, as you still occasionally depend on that WP site, and then have the hassle of handling availability etc.

I wish more CMSs would support exporting all changes directly, so that you could e.g. rsync the sites out to edge servers or a CDN and be able to use it for full failover too without suddenly having stuff expire from the caches at the most inconvenient times.

Movable Type used to be able to export everything to flat files, for example (though, I guess more out of necessity back in a world where not everyone would have a host that could/would provide PHP).

I just started redoing my blog to iterate over all the pages and wrapping my Sinatra app to fake requests to generate a full static copy that way. Lets me optionally serve it up dynamically when writing, and then generate a static copy. It's just a few hours dirty hack for now, but I'll be doing this more often - it's so nice to have most of the content completely stateless.