PHP Runtime Generation 2 will not include wkhtmltopdf.
Pantheon has included wkhtmltopdf with our PHP Runtime since 2012 as a tool for generating PDFs on-demand. This is commonly used by sites that have the print and entity_print Drupal modules configured.
However, wkhtmltopdf has not been updated by its maintainers for 5 years and is considered abandoned. As a result, we are not including wkhtmltopdf with PHP Runtime Generation 2.
Sites that are using wkhtmltopdf should switch to dompdf. Dompdf is a PHP-based rendering engine that can be placed inside a site's codebase. Please refer to the External Libraries documentation for information on how to make this switch.
PHP Runtime Generation 2 will begin rolling out September 17. If you need more time to switch to dompdf, we recommend opting out for now.