Loved it. Many great points.
Good insight in a totally different programming style which can/should influence ours.
Excellent talk, discussing the real possibility of maintaining a shared business library between Magento 1 and Magento 2. The architecture shown was spot on, and Fabien picked the best way to lead us through the process of removing Mage calls from our code.
I grew up with functional programming, and it always feels like my mother tongue. Vinai once again nails that line between introducing a topic, and giving some great talk for people who know a thing or two.
Fantastic entry point for getting into functional programming with Magento, and with PHP in general.
Great ideas and something that should be in high demand for developers as it eases things quite a bit if you know why you do it.
"Always choose the right tool for the job"
Good insights, very sensible appeals to Magento and to every single developer.