That would mean, that everybody would stop mining it. They would have to.
And that would be declaring Grin a complete failure - in a few weeks as you mentioned.
I don't see it.
Well... not everybody, just ~75% or so to push the diff low enough to make mining profitable again.
What coin are you suggesting is better to mine right now (w/ reasonable exchange volume on at least mid-tier exchanges.) From what I see, this is by far the most profitable (esp on 31,) by an order of magnitude.
*You might just be able to flash pro series amd bios to mainstream but the Firepro software checks for certain on board things*
I don't think you're ever gonna get a vega to 1080ti performance. But it's currently in line w/ a 1070ti - 1080, which isn't bad in my opinion, given the lack of dev focus on AMD at the moment... I get .44 for c31 on my 64s @ 165W - can do quite a bit better I'm sure, if i was willing to run 200+W.