With the recent changes regarding the YAML extension in Symfony4 (https://medium.com/@fabpot/symfony-4-best-practices-b4bbd6a9c994), every files in the configurations folder (now etc) changed from .yml to .yaml. When I tinkered a bit with the new version, it appear that it currently suffer of consistency and you need a mix of .yaml and .yml files depending on their uses. Should that new change apply only in files in etc or everywhere (such as the translations directory)?