[tiagod]

It did make it easier, at least the barrier to entry. I remember reading about jails years ago, when I had a lot less sysadmin knowledge, and I couldn't wrap my head around it.

With docker, many people still can't wrap their head around how it works and will do stupid things if they need to run them in a serious environment, but they can still run a bunch of containers to run some hard to install software easily on their local machine!

Sure, jails were easy in some ways, but boiling docker's success to sexyness, instead of usefulness, sounds a bit like yet another "Dropbox is just rsync". Docker wasn't solving the isolation issue (which had been obviously solved for years) but mostly the distribution issue.