1) Jim Katen and myself are Home Inspectors and have been for many years, although both of us have extensive hands on, practical experience in the electrical fields, unlike most home inspectors.

2) Show me some documented source that says a Pushmatic panel/breaker is "Obsolete"... Show me evidence of just one panel that is "Worn out"
If the AFCI argument is all you have, it's a pretty weak argument in my opinion, especially here in NJ where the "requirement" for AFCI was struck from the codes right from the beginning. The only thing more weak would be the limited protection AFCI's really provide, they are not by any definition a be all/end all of electrical safety.
As Jim said, they were produced into the eighties. You call this old and worn out?

3) I know at least one inspector who has installed two Pushmatic panels in his own home and I have thought several times about doing the same, if I could get my hands on the one, just cause I think they are cool & unique.

Inspectors have an obligation to protect there clients, from real dangers and from wasting excessive money because they were sent into a frenzy by an inspector myth with no validation at all.