I agree with Pete 100%. I would not ever and never will recommend a Pushmatic for replacement based solely on it's age. Thats a ridiculous concept to me. They were great panels/breakers.

Exactly what is the life expectancy of an electrical panel anyway? Can anyone tell me? (based on some kind of research)

I would trust a Pushmatic to trip on overload more then I would most brand new modern breakers. And you can get replacement new, OEM breakers for nearly a dime a dozen on ebay, including GFCI breakers.

You really feel the need to rush out and put AFCI's on certain circuits, (personally I think they are a huge scam) put a small sub panel coming off the Pushmatic and install those few circuits on the sub.

Home Inspectors also need to be rational, not to mention educated. People don't need to rush out and replace everything in their house that is just old. A defect is a defect but old is not necessarily a defect.

My opinion. Worth what you paid for it.