Lumberyard was just a fork of cryengine, that's not what required a rewrite. They threw away all the FPS work that they hired a company to make for them, and redid that from scratch, and then also just rewrite systems all the time because they have no plan.
Over 50% isn't too bad at this point in the game. We'll see if it drops lower over/after the weekend, but that is still a significant portion of subreddits, which are the only thing that generates content for reddit. I don't this this will actually do anything, and I am done with reddit now. I never felt attached to it, and I have found active communities on lemmy for most of my subs, and the community is way better here. I don't need reddit anymore.