The problem is that switching to CF from Dokku is a tremendous increase in complexity. I've been exploring open source/self-hosted PaaS systems for the company I work for, since the manual installs are getting hairy.
While trying CF, I first had to get the BOSH cli, then vagrant, then create a VM for the BOSH director, then I had to generate a CF manifest for BOSH (which apparently tries to install Ruby gems, and so fails without root), then out of the sudden a new concept - "stemcells" - appeared, so I choose one that seems appropriate. I couldn't continue, since by then my drive was full (I only had 4GiB free, and though it'd be enough for a bare installation). And at then end, it seems like one gets a system with a whole bunch of moving parts at various layers.
I don't doubt that CF is a good tool, but moving from Dokku - essentially an extremely thin layer over Docker - to it is like upgrading directly from a 12v solar panel in your backyard to a small nuclear reactor.
