In my recent talk on introducing Disco - the DI container with the damn coolest name(tm) - I talk about why I believe that using XML or any other non-code configuration (YAML, JSON, ...) is not a good idea. This stirred some twitter discussion recently which led to this blog post.
Finally PSR-11 - the Container standard - got approved by the PHP FIG. To celebrate this fact I just merged a PR to make Disco PSR-11 compatible. The latest 0.8.0 release is compatible with the 0.7.0 relase. The only difference being that 0.7.0 relies on the container-interop standard and the 0.8.0 release relies on the PSR-11 standard.