FriendsOfSymfony/FOSFacebookBundle — comment on commit 0a0ea67fba6cc4f1fd1e05cd5107cdbf6e7f559c
File:  line 0
By stof:

@schmittjoh the issue is that you would then include the custom repositories defined by all packages available on packagist even where they are totally unrelated to your root package (as all their package definitions are loaded).
And it would mean making the Solver aware of all loaders whereas they are totally different and decoupled things currently.