Since we're reminiscing, I was working for Engine Yard when Docker was released. I remember engineering and product leadership huddled around a desk wondering aloud whether we needed to do something about it.

In retrospect, of course, it was earth-shattering for the company, despite a valiant effort. The entire expertise of deploying long lived Linux servers and carefully shepherding them through change management with Chef became a relic to most developers. Totally changed the way applications were deployed.

Was an exciting time!