I guess it's not everyone, but I personally use a lot of configuration files. I like to split them when it makes sense and avoid having config files that are too big. On my last 3 good sized projects (not all from me actually) the average was ~50 files.

I personally find very cumbersome to have to manually include them via config*.yml files, so I've done a small locator which register my config files automatically. It works as follow:

• scan the config dir to get all the files there
• filter files: some should not be included at all, e.g. routing and parameters.dist and other are environment specific
• load each of those files

So you basically have the following:

app/config/
    parameters.yml
    parameters.yml.dist  # ignored (like any `*.dist`)
    routing.yml          # ignored
    security.yml         # included for any environment
    security_prod.yml    # included only for the env `prod`
    framework.yml
    framework_prod.yml
    ...
    services/
        foo.yml
        foo_dev.yml
        foo_prod.yml

I would like to suggest to have that feature directly in the core (I can work on it), WDYT?

/cc DX master @weaverryan