Yes, App Engine support is also deprecated: If you are using PageSpeed integration on Google App Engine, it will continue to function until 1st

Yes, App Engine support is also deprecated: If you are using PageSpeed integration on Google App Engine, it will continue to function until 1st December 2015, after which PageSpeed optimizations will no-longer be applied to your app. No action is required on the part of App Engine users; after this date apps will continue to operate, except without the benefit of the PageSpeed optimizations. App Engine users only need to take action if they have something on their site that depends on PageSpeed, which is very uncommon.