This smalls a lot like wishcasting masquerading as critique. I just attended a PQC conference, so I'm biased, but this paper's author makes a lot of very strong claims about the infeasibility of future attacks developing that most experts in the field would disagree with. There is a hope that this is all a fire drill and RSA/EC will survive the next decade unscathed, but there's also plenty of evidence to suggest that incremental improvements in PQ compute will eventually reach their goal. Rather than a big cannon, I see it looking more like AI/LLMs, lots and lots of small incremental improvements by researchers were needed to eventually yield some significant advancements. I pray Post Quantum computing stays in the realm of Cold Fusion, but I'm not about to believe it.

Cryptanalysis has already made a few strides on breaking RSA more quickly, and I've heard from noted cryptanalysts the claim there's a significant chance RSA will be further broken in the next decade regardless of PQ. It's a scary take to double down on RSA of all things.