Interestingly (and perhaps unsurprisingly), DL is now further unbundling (and then re-bundling) certain "perks" to Skymiles members so that they can enjoy priority boarding (Main Cabin 1), a few drinks, and a brag tag -- all for the low, low price of $59:
https://skymilesselect.delta.com/
I'm not sure how I feel about this; though, if you're someone who does travel but not enough to make Silver, this could make sense, right?
(I wonder which blogger will write about this in an article without a H/T?)