Then how can be that an incentive for Docker's adoption? Honest question; if, as you say, this is a solved problem thanks to package managers.
I can't even remember the last time I had a real dependency problem deploying an application (using Debian; and CentOS before that), other than myself not doing things right (read: installing RPMs I found online and I shouldn't install).
Well I wasn't originally speaking wrt Docker, but Docker doesn't magically lose all the hard work done by package managers. You have total access to them in your containers.
I can't even remember the last time I had a real dependency problem deploying an application (using Debian; and CentOS before that), other than myself not doing things right (read: installing RPMs I found online and I shouldn't install).