Gersen: I don't think it was mentioned in this thread, but you can actually enable the "online only" content while being 100% offline by simply modifying two lines in the save file, quicksilver, living ship, daily missions and co.
A dumb decision on HG part, yes, the Gog version should do that automatically, but it's not exactly the end of the world either IMHO.
Now concerning the whole drama, personally I consider that the SP part should be fully playable offline and DRM-free, period.
But I can make some exception depending of what actually is said online "content" if it's something "useless" like some optional skins, for example the paint job in X4, of if it's some quests directly linked to MP like reaching some score in MP, etc... I don't really care as long as the "core" of the game is 100% online.
For NMS, if there was no way to have this content offline, I would have been torn, on one way 99.99% of the game is available offline, the online is some extra stuff that was added, also it is worth mentioning that 99% of the stuff you can purchase with Quicksilver in the game are purely "cosmetic" and have absolutely no game play impact what so ever, again very similar to the skin from X4, the only thing that has some game play impact is the void egg that is needed to trigger the mission with the living ship.
So in conclusion, while I agree that having SP stuff locked down to offline player is a very dangerous slippery slope, in the case of NMS it's pretty minor and a fix is easily available to unlock everything while offline.
Do I think that HG or Gog should enable those features by default without peoples having to change two lines in their save ? yes, definitely and I hope Gog will contact HG about it, but do I think it's work delisting the game or anything of the sort ? no.
Clearly nothing to worry about then. Oh well. Shop as usual.