Not sure why you were downvoted as your statement that an IFR of 0.3 to 1 was always about the expected rate is completely right. E.g. https://www.nejm.org/doi/full/10.1056/NEJMe2002387 published by Dr. Fauci and Dr Redfield on February 29.

Weirdly I’ve seen a lot of attempted history rewriting, I guess by people who in March didn’t understand the medical literature and confused CFR with IFR.