Like most, I don't think NMS is comparable to Elite for many reasons.
Their story, though, is highly interesting - zero to (negative to) hero and all that.
I don't think NMS will ever pose a genuine threat to the likes of Elite unless its flight model received a significant overhaul. I imagine someday it will, but like along the lines of arcade 'twitch' gameplay rather than flight sim a la Elite. Which is totally fine with me, I enjoy arcadey at time, I enjoy sims at times. I'm very glad for both games...though I have to admit the goodwill with NMS is much greater these days.
I was an original preorder to NMS, I remember the center of the universe after hundreds of jumps and refuels...it has come a very long way. I didn't join Elite until PS4 launch, but I have to wonder:
If I was a LEP holder...and a day 1 NMS player...
Would I have more goodwill for NMS, too?