14nm or so is kind of a sweet spot for general purpose chip design right now, because later nodes turn out to have higher overall per-transistor cost despite the improvement in density and area. Of course this may well change over time as even finer production nodes get developed and the existing nodes then move closer to the trailing edge.
The article linked in another comment pointed out that cost per transistor keeps falling, and it's just the fast increasing fixed costs that make it seem otherwise.
Interesting! Could you perhaps point me towards the source where I could read up on the state of the art of chip manufacturing and the implications coming from the respective manufacture processes?
