Oh I see, you're good at finding stuff. And yeah, now I remember this thread. Already been there...
BTW, OP was referring to TSB RSM with cloak which he considered to be the only true form of RSM i.e. the one gained by JJ. How can you tell that he was saying "Naruto lost RSM overall" rather than "Naruto lost the power with TSB and cloak which I'm calling RSM since I believe that to be the true RSM"? Naruto's forms are confusing nevertheless. (I can take you on a topic about Naruto's forms and confuse you within seconds).
Or maybe he was trolling. This guy has the reputation of shifting from fanboying Sasuke to fanboying Madara to again fanboying Sasuke. So what makes you think he can't temporarily deviate on such topics?
What his actual context is, you can ask himself that for clearing up this issue. You and I can't be sure about his implication, OR whether he has the same belief now or not.
Perhaps... Most probably trolls here and there. Or maybe different implications you don't understand. No one seriously believes that Naruto lost RSM as of now those who know that RSM is just plus signed eyes.
Post#10 in the same thread you linked.