Interesting comment on the article:

Jay Feldblum on 04 Jan 22:30: Heroku currently injects configuration code into vendor/plugins to configure your application for the Heroku platform. Other deployment systems do the same. For example, Heroku injects a plugin to disable x_sendfile, and another plugin to set Rails.logger to log to $stdout.

If vendor/plugins is to be phased out, how should Heroku and other deployment systems inject configuration code? An initializer?