What about disabling all components by default in symfony 3.0.
I think it's really confusing that some things are enabled by default and others are disabled by default. This way it's really hard to configure a symfony where only the stuff you need is enabled because you have to figure out all the defaults first.

Indeed, having everything disabled by default would be better; and Symfony SE can enable the most important things and add comments to enable less important features. Anyone willing to work on this for 3.0?
fabpot

#13672 (comment)