1. Questionable Writing Quality
"The writing here seems very odd. It reads like a product announcement or blog page, not an article in Nature." – iandanforth
2. Skepticism About Peer Review & Significance
"Without open peer review like in the old days it's hard, even with frontier models, for nonexperts to know if the above breakthrough was (unfairly?) relegated or how significant TFA is truly." – oliculipolicula
3. Confusion Over Technical/Jargon Details
"\"a single layer of Bi2Sr2CuO6+δ (Bi-2201)\"" – gavinray