The irony is that digital audio has much more dynamic range than vinyl, and yet modern productions use much less of it in order to psychologically sound better / louder.
This is the main point I take from the linked article, although it probably doesn't give enough context for everyone to do the same. One of the big improvements music-lovers were hoping for in move from vinyl to CD was the improved dynamic range on CD. It is indeed ironic that the move to CD/digital provided increased dynamic range, yet the trend of producers has been to use less dynamic range than before.