ETH only lost ballpark 35% from it's peak, where BTC lost over 60%.
Less ground for ETH to make up now - but it's also been growing hashrate quite a bit the last few months - not as much on a % basis as back in the spring, but MORE on an absolute basis.
AMD should be a bit worried about the situation - that's MILLIONS of AMD GPUs (and not all that many Nvidia) heading for a crash when ETH finally goes PoS.
Tbh, currently you can use your AMD rigs to mine other stuff and make pretty much as much.
On a sidenote, given the total absence of decently priced GPUs out there, is there a way to get a semi-decent, stackable Ryzen or Threadripper setup going as alternative? There aren't even multi-CPU boards available, are there?