Is it possible to run a serverless Wordpress installation?

I've done this before, with all data stored in RDS mysql and wp-uploads in s3, but it's kind of pointless and less performant.

Your lambda bundle will effectively be just the entire contents of your public_html, complete with full php-fpm-equivalent spinup time with no reused sockets or caching. The executor is similar to something like exporting some fake envvars (like a path, query string, user agent, ip) and then effectively running `php index.php` or similar.