There should be several sites, starting with something like a similar distribution, but over time, each site might get some individual modules. Yet, I'd like to keep the site updated with new versions and new configurations over time as well.
So I can't use the full import/export of configuration management, since this would delete my individual additions on some sites, if I understood it correctly. And I need to be very careful with single exports, since those don't care about dependencies.
Configuration Packager has been merged into Features, so it seems as I need to use features anyway.
So what do I put into a configuration? And what into a feature? And how would I distribute the preconfigured stuff to all sites? Use a feature server like in Drupal 7? (If the Github process is setup and I've got a dev and several production sites, how do I push configuration and feature updates to production?)