NMS owned me for about six weeks upon launch. After that I've loaded it up from time-to-time to see what's changed, and occasionally I've played it for a week or two, but despite several updates (and good on them) it doesn't have the long-lasting appeal for me that Elite does.
This is my story as well. As I've said before, if you could take the best parts of NMS and combine them with the best parts of ED, that would be an incredible game! As it currently stands, ED is my favorite of the two games, primarily thanks to the Stellar Forge and its pseudo-realistic approach to creating a believable, immersive "simulation" of the future (unlike NMS' Saturday morning cartoon approach).
But to the topic of this thread, I feel NMS is more deserving of the "Evolving game" award, assuming they haven't already won it as someone claims.