I know most of y’all care about Standard Edition.
With SP1, you can use all sorts of (formerly) super-expensive features like data compression, partitioning, Columnstore, Change Data Capture, Polybase, and more in Standard Edition.
A few features have scalability caps in “lower” editions. There’s a memory limit for In-Memory OLTP (aka Hekaton), and Columnstore. Columnstore also has restrictions on parallelism.
I’ll also throw out my experience as an anecdote: 2016 has been more stable than 2014 in our environment. I don’t regret going to 2014, but we’re better off on 2016.