Totally agreed. I don't like Docker but I do like both SmartOS and FreeBSD jails. If you're even somewhat interested in containers you need to take a look at SmartOS (I liked http://timboudreau.com/blog/smartos/read as an approachable "getting started") and FreeBSD jails (https://www.freebsd.org/doc/handbook/jails.html). For Jails I like ezjail and iocage as good wrappers so you may want to start there. You can't have a coherent opinion on the technology if you haven't seen how other people are doing it.

And OpenShift: https://enterprise.openshift.com/

I'll pile on!

Cloud Foundry is another opensource PaaS: https://www.cloudfoundry.org/learn/features/

(Disclaimer: I work for Pivotal, which donates the majority of engineering effort to Cloud Foundry)