Based on the article I don't think those are the problem. I think the new Apple silicon is distinct enough that it needs a bit of porting effort to get a Fortra

Based on the article I don't think those are the problem. I think the new Apple silicon is distinct enough that it needs a bit of porting effort to get a Fortran compiler running, along with the issue of quirks in handling NaN payloads and some other (seemingly rather minor) differences.