Is there a graph (or any other visual "thingy") to see how the core modules depend on each other in Magento 2?
(Yes, I tried Google, but he doesn't want to tell me.)
http://www.versioneye.com is a great tool to track Projects and its dependencies.
But as https://github.com/magento/magento2-community-edition is not part of http://packages.magento.com/ yet, we need to do a bit of magic to get it.
You need to create an own project and submit the composer.json from github as reference. The result will be similar to this.
Its so big, as it also shows all non magento dependencies and even php extensions itself or one of the dependencies depends on.
You may want also to look at the modules for itself, like the checkout module: https://www.versioneye.com/php/magento:module-checkout/0.42.0-beta9/visual_dependencies or the module-core: https://www.versioneye.com/php/magento:module-core/0.42.0-beta9/visual_dependencies
and here the dependencies of the framework itself: https://www.versioneye.com/php/magento:framework/0.42.0-beta9/visual_dependencies
https://alankent.wordpress.com/2013/10/19/magento-2-module-dependencies/ Is something I wrote a while back. Graph still ugly due to number of modules. But there are more optional modules.