The biggest difference maker for me is using hashed filenames for non-html resources. That way even if the html caches too long it's at least a coherent experi

The biggest difference maker for me is using hashed filenames for non-html resources. That way even if the html caches too long it's at least a coherent experience, and if anything else caches too long who cares, the user doesn't see it anyway. I don't know what your pipeline looks like or if you're already doing that, but if not it's worth a look.