It's been pretty gone from Australia since August. Fortunately the 5700X3D is most of the gains for $350 AUD ($200 USD) so it's a worthy chip for upgrades from Zen 1. Otherwise yeah a new platform might have to be the way to go.
I don’t fully understand the laws behind everything but my interpretation is that Nintendo are leveraging the DMCA to say “extracting your own encryption keys and copying your own owned version of the software” constitutes piracy (even if you paid for your own copies and you’re using this for personal use). Yuzu explained on their documentation how to do this which therefore means they are infringing on intellectual property. Them developing software to then use this dumped data to emulate games is more icing on the cake but is a consequence of that previous point. I think the only precedent cases are ones from before the DMCA was really abused like it is (so cases like Sony v. Connectix and Sega v. Accolade).
Would an A770 16GB work in your case? They’re silly cheap here in Australia and the only pitfall is whether it’s compatible with the games/software you’re running.