Very true. However there was also the long tonal scale that was and remains rather unique for a slow film. IMHO, no modern slow film comes even close to Pan-X in this respect.
It all comes down to modern emulsion technology. Manufacturers have gotten very good with conventional films at creating silver grains whose size remains within a very narrow range. While this makes for fine grain it also reduces the tonality range of the film. Films whose grain size has a much broader spread have better tonality. Another example that in photography you can't have everything.
I don't necessarily disagree with you, but TMax 400 might be the exception. 14 stops, straight as a nail. Most of the time that is more than enough. I don't know what the Panatomic-X was capable of...
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