Good article.   It is also worth mentioning, if only for the record, that “Plack is not, strictly speaking, ‘a tool that (say...) serves static content,’ ” although it does very-conveniently provide one should you elect to use it.   All in all, Plack is a very nice and well thought out combination of both the lowest-level “plumbing” and a sensible set of higher-level tools (such as these) which you are sure to find very useful when actually deploying solutions in production settings.

I guess it is partly because Plack isn’t specific to any one web-server, that it quite naturally provides a set of tools and plugins that do (in a very low-overhead fashion) the usual web-server chores ... “use them or not, as you prefer.”